Thanks for the postings, Angelo and Iowwall, and for the likes, Jale and Angelo. And you are right, Angelo, about today's Technisub snorkel product names being inspired by winds.
First the Bora. The Bora is a northerly to north-easterly wind in areas near the Adriatic Sea. Here is the model in
1969:
Italian: "
BORA - respiratore rigido - boccaglio in gomma corrugato - 810 - 600.
BORALUX - respiratore semirigido - boccaglio in gomma corrugato - 811 - 650".
Rough translation: "
BORA - rigid breathing tube - corrugated rubber - 810 - 600.
BORALUX - semi-rigid breathing tube - corrugated rubber - 811 - 65".
So two versions of a flexible-hose model, the Bora with a rigid barrel, the Boralux with a semi-rigid one. Flexible-hose snorkels were known to be favoured by scuba divers back then as the mouthpiece dropped away when out of use. They also tugged less on the mouth, sparing the user potential jaw-ache if deployed for long periods of time.
Here are the Bora and the Boralux in
1973:
While the Italian caption of the Bora snorkel conveys the same information as its 1969 counterpart, the Boralux version mentions the new safety feature of a "tubo flessibile fluorescente, visibile in superficie a grande distanza", (flexible fluorescent tube, visible at a great distance).
The
1976 catalogue provides the same details about the Bora and the Boralux: