Basic gear from the Czechoslovak Socialist Republic

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David Wilson

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On to a new thread, this one about production of fins, masks and snorkels in a landlocked Central European country that became a Soviet satellite after the Second World War and eventually separated to become the Czech Republic and Slovakia after the demise of the USSR. For the information I intend to post here I am indebted to a couple of Czech websites:
  • Dušan Šuráni's "Vintage Scuba Collection" website at VSC - sbírka potápěčské techniky. As the website title suggests, this is the labour of love of a collector and historian of underwater swimming equipment in Europe and contains data about gear manufactured both within what was then Czechoslovakia and beyond its territorial borders.
  • "Sportovních potápěči Kladno" at Aktuality | Sportovní potápěči Kladno. This website, whose title translates roughly to "Sports divers of Kladno", focuses on Czechoslovakia's first diving club in the Central Bohemian city of Kladno. There's an excellent history of the club's beginnings and the emergence of home-made diving gear in the section entitled "O nás" (About us) at O nás - Sportovní potápěči Kladno | Sportovní potápěči Kladno.
The textual content of both sites is written in Czech, which is one of the languages available at Google Translate if you wish to study my sources more closely. I visited Prague, Brno and Bratislava during the 1970s and got by there using my knowledge of German alongside a small Czech-English bilingual dictionary and a tourist's phrase book. Czech is a Slav language and therefore related to Russian, although it uses the Roman alphabet with a number of additional accented characters. Should any of my readers here have any fluency in Czech, I apologise in advance if I make any schoolboy howlers when translating from the language.

Anyway, let's get started on the gear. There's not a lot to review, which is why I don't intend to have separate threads for Czechoslovak fins, masks and snorkels. This posting will be about fins and my online source of pictures can be found at VSC - sbírka potápěčské techniky.

Vlastimil Hrůza's open-heel fins
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The inspiration was the films of Hans Hass, whose swim fin design was originally manufactured by the Semperit company in his native country of Austria:
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Vlastimil Hrůza (1927 - 2012) from Kladno was the remarkable man who came up with black and dark green Czech versions of Hass's design. They are illustrated in the first three images of this posting. They were the first fins to be made to a professional standard by an individual in Czechoslovakia. According to Dušan Šuráni, "Vlastimil byl šikovný a zručný a dokázal si vyrobit formu na ploutve" (Vlastimil was clever and skilful, and he managed to make a mould for fins). He manufactured the fins using machinery at the Kadno KABLO works. The fins, which mainly came in black, were reserved for his friends.
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The Kladno diving club's "O nás" web page tells us a little more about Vlastimil Hrůza (above) and the diving equipment he designed and produced. We learn there that Vlastimil was employed as a cable repairman in the KABLO Kladno cable factory (below):
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We also learn that the fin mould he designed was constructed at the Tauber foundry and the cable factory provided him with the wherewithal to press the fins, which came with a strap, but without a heel, in one size only. In the circumstances, Czech divers had no alternative but to make their own gear, because importing fins from the West in the early 1960s would not have been a priority for cash-strapped East European economies, while both the USSR and its satellite countries manufactured and marketed little underwater equipment of their own back then for the recreational market. On the positive side, the nationalised companies of Czechoslovakia in general, and the Kladno Kablo factory in particular, provided their employees not only with wages but also with social facilities such as sports clubs, which is why Vlastimil received the backing of his factory when he used their machines to make diving gear for his comrades. The factory also enabled the divers of Kladno to make contact with East German divers, who bartered the underwater products of their own country for goods made in Czechoslovakia.

So far as I am aware, Vlastimil's one-size-fits-all open-heel fins with their rubber or wire straps were the only fins ever made on Czechoslovak soil. We'll move on next to Czechoslovak-made diving masks.
 
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Onwards and upwards to diving masks made in the ČSSR (The Czech acronym for the "Československá Socialistická Republika" or "Czechoslovak Socialist Republic"). My online research led me to identify four different Czech mask models. Let's begin with the earliest example, made by the cable works employee and amateur diving gear designer Vlastimil Hrůza (below).
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Vlastimil Hrůza's diving mask
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The final image
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According to Dušan Šuráni's "Vintage Scuba Collection" website at VSC - sbírka potápěčské techniky, the final image came from a book about sports diving that appeared in Prague in 1963. Note the use of wire in the mask head strap, a signature touch repeated in the green version of Vlastimil Hrůza's home-made fins.

The page on the Kladno diving club website entitled O nás - Sportovní potápěči Kladno | Sportovní potápěči Kladno has some interesting things to say about early Czech mask-making experimentation in general and the contributions of Vlastimil Hrůza in particular. In the case of the former, Czech magazine articles back then encouraged people to make their own diving mask out of a child's rubber bucket. As for the divers of Kladno, they made their first diving masks out of old gas masks or even car tyre inner tubes.

Vastimil's masks were a cut above these crude home-made efforts. Access to appropriate facilities at the Kablo cable plant enabled him to make continuous improvements in mask design. He made his own mask mould out of tinplate, substituting one made of steel later on. His improvements focused on ensuring that the masks fitted better and their watertightness increased. His later masks featured a groove in the skirt to secure the glass lens.

Just as he copied System Hans Hass fins when designing his home-made open-heel fins, Vlasimil may have modelled his mask on the System Hans Hass mask, pictured below in a version made during the 1950s by Heinke of London:
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Anyway, judge for yourself.

That's it for today. I'll move on in my next sequence of messages to the remaining three Czech-made diving masks, which appeared in subsequent years and were manufactured for national distribution.
 
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Next in our lineup of Czechoslovak masks is the PL-40 and once again I am indebted to Dušan Šuráni's "Vintage Scuba Collection" website at VSC - sbírka potápěčské techniky. The relevant page on this website for the mask under review here is at VSC - sbírka potápěčské techniky.

PL-40 diving mask
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Here is my very rough English paraphrase of the Czech-language commentary on the PL-40 mask that can be found on the web page:

Produced during the early 1960s, this diving mask was a constituent part of the PL-40 military light diving equipment set. It was manufactured from hard black rubber and, like other early diving masks, it had no compensator enabling the nose to be squeezed when equalising pressure in the middle ear. The soft rubber headstrap was anchored to the mask by simple buckles. As the skirt was not shaped to fit snugly, the mask leaked when it was worn underwater. How to get it to fit on the face was anybody's guess.

For the lens, shatterproof glass was used. The mask was supplied exclusively to the Czechoslovak People's Army. Military divers always used this mask when they deployed light diving equipment set No. 1 (see image above). I do not recall this diving mask ever going on sale to the public. PL-40 equipment was only available to diving clubs.


To sum up then, the PL-40 mask was designed for the exclusive use of the defence forces of the ČSSR and not for release to the general public. It was one of the constituent parts of the PL-40 military diving equipment set and not available separately. The PL-40 was a plain, traditional mask, prone to leakage and without the comfort and convenience of a compensator, drain valve or feather-edged skirt. It came with a metal rim, an oval shatterproof glass lens and a stiff rubber skirt. The softer headstrap was threaded through metal loops riveted to both sides of the mask rim and it was then fitted to the circumference of the head using a separate toothed buckle on either side to prevent slippage after the final adjustment was made.

I somehow get the impression that the PL-40 mask looked a lot better than it worked.:rolleyes: I'll move on soon to another Czechoslovak-made mask, the next one dating from the 1970s.
 
DRW,

This PL-40 mask bears a remarkable resemblance to the La Spiro Squalle mask.

SeaRat
 
DRW,

This PL-40 mask bears a remarkable resemblance to the La Spiro Squalle mask.

SeaRat
You're right, John. That fact should have occurred to me too as I've been researching early French diving gear recently:
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The above comes from the 1955 US Divers catalogue, which can be viewed in the wonderful catalogue collection accessible from the Vintage Double Hose forum, where there is also a very informative thread on the subject of the Squale mask.

It would make sense for the Czechoslovak defence forces to adopt the Squale mask, considering how much the mask was favoured by the US Navy. I wonder whether the PL-40 was a debranded version of the Squale or simply a Czech-made copy.
 
DRW,

I see another similarity, and that is between the Czech mask shown in the first photos above and the Champion Deluxe mask, one of my favorite masks. I still have one of these masks, and it seals extremely well whenever I decide to use it. But it too does not have the nose indents for clearing my ears. To clear with this mask, use the thumb and first knuckle of the index finger to push up on the bottom of the mask skirt.

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From an early U.S. Divers Company catalog.

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Me using my Champion Deluxe mask in Clear Lake, Oregon. This is a photo of me in Clear Lake, undergoing some physiological tests on experimental dives in Clear Lake, Oregon. This dive occurred either on June 14th or June 16th, 1971, only a few weeks after my discharge from the U.S. Air Force and return from Vietnam. The research was for two Ph.D. theses from University of Oregon Ph.D. students Alex McNeill and Joe Russel. Joe later went to the Institute of Environmental Stress at the University of California. Here I'm clearing my Champion Deluxe mask on a dive to a depth of 73 feet. The rig I'm using has two breathing cylinders, one on the right has a calibrated amount of air, and I needed to swim twice on a horizontal course at each depth (3 feet, 37 feet, and 73 feet), while the air consumption was monitored, my exhalations were sampled (using a center vacuum tank), and my cardiogram measured using what then was state-of-the-art printouts on paper.

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I am exiting the water after one of the research dives on June 14th or June 16th, 1971 onto a raft set up especially for the experimental dives. You can see that there are several cylinders, explained in a different photo, and that I'm wearing a Champion Deluxe mask for these dives.

These were very good, but basic, designs.

SeaRat

PS, I just looked at my Champion Deluxe mask, and on the front of the lens it states, "TREMPE," then below that, "MADE IN FRANCE." Molded into the mask near the metal ring is the words, "FRONT SIDE," then "CHAMPION," then "COTE FRONT." Below and also molded into the rubber are the words, "RENE CAVALLERO
ETCIE," then, "MARSEILLE B.DU RHONE." This mask, which is black in color, is in like-new condition, and I have dived it last summer.
 
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The Champion mask certainly resembles Vastimil Hrůza's home-made mask quite closely, other than in the way the strap is fastened to the body of the mask. I wonder whether he might have used a "Champion" mask as a model - Cavalero certainly entered the diving equipment market very early and they made very good equipment. I have a pair of yellow closed-heel Champion Hydromatic fins with closed toes, which were very popular during the 1960s perhaps because they were so comfortable and photogenic. My research leads me to believe that compensators were a French invention, in equal measure due to the ingenuity of Marin of Nice and Beuchat of Marseilles, both of whom patented their versions around the end of the 1950s. The word "trempé" on your mask made me smile because the adjective has a couple of different meanings in French. One is "soaked" or "drenched", the other is "tempered". Purchasers would have hoped that the word referred to the shatterproof quality of the glass lens and not to the mask's proneness to leaks! Yours, John, sounds as though it fits you perfectly.
 
On to the Czech-made "Bobr" mask and I am indebted again to Dušan Šuráni's "Vintage Scuba Collection" website at VSC - sbírka potápěčské techniky. The relevant page on this website for the mask under review here is at VSC - sbírka potápěčské techniky.

Bobr diving mask
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Here is my very rough English paraphrase of the Czech-language commentary on the Bobr mask that can be found on the web page:

Since 1971, the Sportklimex company of Prague has manufactured the "Bobr" (=Beaver) diving mask from hygienic black rubber (Czechoslovak Standard 62 00 11: Technical rubber products: Technical supply regulations). The rim, buckles and clamping screws are all made of stainless steel. The joints on the rim are made of high-density polyethylene. The faceplate featured 4 mm thick shatterproof tempered glass. The headstrap (20 x 520 mm) is double-thickness and made from the same rubber as the mask with a hardness of 40 to 50 Shores. The strap, however, is harder than its counterpart on conventional masks from abroad. The mask is shaped like the popular French Naso mask (made by La Spirotechnique/Technisub). The compensator enables the ears to be cleared by squeezing the nose.

The manufacturer provided a 6-month warranty and announced that the mask represented a high level of technology. It was supplied to the Czechoslovak People's Army and to the wider diving community. Its price was 180 Kč (180 Czech Crowns).


Three more pictures sourced from the manufacturer of the "Bobr" mask:
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My rough English paraphrase: BOBR DIVING MASK (Refurbished). The BOBR diving mask not only enables the swimmer to have perfect vision underwater but also protects his eyes and nose. It consists of two parts, namely a rubber skirt and a shatterproof tempered glass lens. The skirt is shaped to provide a watertight face seal and to enable the nose to be squeezed when equalising pressure in the middle ear. The mask is secured by a rubber strap, which may be adjusted to fit the circumference of the diver's head. The product is supplied exclusively as a refurbished item!
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My rough English paraphrase: Diving requisites. "BOBR" (Beaver) Diving mask. Moulded parts are made of non-toxic rubber. Stainless steel metal parts and tempered-glass lens.
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My rough English paraphrase: Sportklimex. Manufacturer: AQUACENTRUM, MV SVASARM COMPANY IN PRAGUE, RADLICKÁ ST. NOUZ. 7. BOBR diving mask. Used to protect the eyes and nose when diving. Fitted with tempered glass lens.

And finally, here are images of a La Spirotechnique / Technisub "Naso" mask for comparative purposes:
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The "Naso" mask may have first appeared in the 1965 La Spirotechnique catalogue and in the 1967 US Divers catalogue.

I'll move on to the Czech-made Sportklimex "Akara" mask next. It was available in the 1980s.
 
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Now for the last Czech-made mask and another acknowledgement to Dušan Šuráni's "Vintage Scuba Collection" website at VSC - sbírka potápěčské techniky. The relevant page on this website for the mask under review here is at VSC - sbírka potápěčské techniky.

Akara diving mask
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And here is my very rough English paraphrase of the Czech-language commentary on the Akara mask that can be found on both the web page:

Since 1985 the Aquacentrum company of Prague has manufactured a diving mask named “Akara” from hygienic black rubber. It was comparable in quality to the popular NASO mask. The main improvement over the previous BOBR mask was a skirt shaped to provide a snug and comfortable facial fit.

The rim, buckles and clamping screws are all made of stainless steel. The joints on the rim are made of high-density polyethylene. The faceplate featured 4 mm thick shatterproof tempered glass. The adjustable headstrap was also softer. The compensator enables the ears to be cleared by squeezing the nose.

The mask was supplied to the Czechoslovak People's Army and to the wider diving community. Its price was 300 Kč (300 Czech Crowns).


Another picture sourced from the manufacturer of the "Akara" mask:
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My rough English paraphrase: The AKARA diving mask not only enables divers to have perfect vision underwater but also protects their eyes and nose when they dive with or without underwater breathing apparatus. It consists of two parts, namely a rubber skirt, a shaped shatter-resistant glass lens and a metal rim, fastened with a rubber strap whose length is adjustable to fit the diver’s head size. The skirt is shaped to seal against the face and nose when squeezed, enabling pressure equalisation in the middle ear.

A vintage (mid-1980s) illustrated Aquacentrum Praha catalogue in Czech featuring the "Akara" and "Bobr" diving masks can be downloaded in PDF format from the website at http://www.vsc-ds.cz/soubory/priloha/297/katalog-vyrobku-aquacentra-praha.pdf. According to the website at VSC - sbírka potápěčské techniky, Sportklimex was founded in 1969, merging in 1972 with Aquacentrum, a compressor manufacturer. The successor company manufactured diving equipment for the Czechoslovak People's Army and for the wider diving community.

In my next message I will be returning to Vlastimil Hrůza for a review of his home-made snorkel mouthpiece.
 
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I'm a little late with this posting as I woke up this morning to find my Firefox browser completely transformed after its upgrade. It took me an hour or so to find all my old bookmarks and make them more accessible. Right, grumble over and on to Czech snorkels, or more precisely a Czech snorkel mouthpiece. And once again I am indebted to Dušan Šuráni's "Vintage Scuba Collection" website at VSC - sbírka potápěčské techniky.

Vlastimil Hrůza's snorkel mouthpiece
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These mouthpieces were designed by Vlastimil Hrůza (above) and manufactured using machinery at the Kadno KABLO works where he was employed. They were what was called a "flute" mouthpiece" (флейтовой загубник) in the Soviet Union and a "clarinet" mouthpiece in Western Europe. Such mouthpieces were used on L-shaped snorkels, whose advantage over traditional J-shaped snorkels was that the breathing tube had less tubing below the mouth where water might collect.

Note the letters "VH" embossed on the mouthpiece, presumably the initials of its designer Vlastimil Hrůza. Unfortunately, I haven't uncovered an image yet of Vlastimil's mouthpiece attached to a tube to form a complete snorkel. "O nás" (About us) at O nás - Sportovní potápěči Kladno | Sportovní potápěči Kladno, the other source to which I referred while reviewing Vlastimil's "home-made" fins, only refers to a magazine article showing readers how to make a snorkel from a length of pipe. The web page includes an illustration of a snorkel with a ball valve used by the Kadno diving club:
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However, further online research brought up a page from the Czech Historical Diving Society website at Potápěčská technika HDS CZ where the same model was identified as a "Dýchací trubice (šnorchl) s míčkem, výroba NDR (později Maďarsko), výroba cca začátek 70-tých let" (Breathing tube [snorkel] with ball valve, manufactured in the GDR [later Hungary], manufactured around the beginning of the 1970s), so the snorkel in the picture is an import, not a Czech-made product.

This contribution completes the current series of messages about Czechoslovak-made basic underwater swimming equipment. I will soon be starting a thread about fins, masks and snorkels manufactured in other East European countries before the fall of communism. The countries I am minded to review are Bulgaria, Hungary, Poland and Yugoslavia. The threads will not necessarily be in that order as my online research is still in progress.
 
https://www.shearwater.com/products/teric/

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