From Google Translate:
Although now often the year is 1966 mentioned as the year of birth mK 5, that's not right. Already from 1965 offers Scubapro as neie top level a MK 5 at. This has a fairly simple configuration: 1 high pressure port centrally upwards. Since the first MK 1 flopped, this model was then transformed in 1967 to the new MK 1 and MK krieert new. 5
The new model from 1966 got a turret donated and now had the high pressure port on the left side. The turret with 2 outlets remained until 1977 and was first secured by a snap ring, later steeped a pierced screw. This MK 5 was responsible in large part for the reputation of Scubapro as highend brand and was regarded as very reliable. Initially, it was the normal downstream stage 108 combined (this combination was designated in Europe as Mark IV), from the introduction of the second eitstellbaren Strufe 1969 there was then with the 109th This version of the Mark V was also known as "Military" version sold in black. In Europe, there were at times she also with right high pressure outlet.
The next stage of development of this successful machine was then a turret with 4 outlets. here we went different routes: Goods in the US drilled disposals in series, so was placed in Europe crosswise.
Briefly, there was the Mark V with two high-pressure and medium pressure 4 disposals, but a centralized-pressure departure was quickly supplemented, so that the maximum 5 ports were reached.
Then came more and more the subject of protection against the cold on the table. Had they been bolten a specially coated piston cold water (black) early in Europe, so was 1980 optional grease chamber "Environmental", which was retrofitted with the most different variants of the Mark V. Deher we are today operating in a wide variety of post-built variants.
With the introduction of S.P.E.C. Cold water technology was installed as standard this protection the MK. 5 This then corresponds to the last built configuration. This variant has been offered as a "Military" version in black.
Interestingly for the user that the last MK 5 got a DIN connector with conical sintered filter. Since the flat sintered filter for the original Amschluss are no longer available, in case of doubt, retrofitting can be useful.
A special form of MK 5 dive sometimes on: 1981 provides Schubapro for retrofitting an audio adapter. This can be mounted in the MK 5 instead of the swivel head and then takes over the function of the audio reserve such as MK 7: At low cylinder pressure there is a knocking noise and vibration of the mouthpiece.
Werthwein, Frank, 50 Jahre Scubapro, Herstellung und Verlag: BoD - Books on Demand, Norderstedt, ISBN: 9783848253531, Printed in Germany, copyright 2013, pages 181-183