MARES - SAFE fitting dated 1976 for the double cylinders was special, not only for its dimensions and weight. To guarantee safety, its side connection to fix the secondary air source "was catching" under the reserve thus, if for any reason the reserve did not open, changing to the secondary air source bypassed it. Vice versa, if someone was breathing from its secondary air source and the reserve did not open, all air could be used changing to its primary regulator in the central position.
TECHNISUB - ARALU cylinders of the 70s – 80s in good conditions are valued by collectors, above all, if they have their visible red stickers, intact or almost. However, be careful to these differences: those made in the first years were much more spectacular; in fact, they had the "moustache” in the upper position bigger than the logo and there was frame while, in the next years, the moustache became smaller aligning it with the logo. Everything framed by a black border line. This solution was firstly reserved to the small 4-liter cylinder then expanded to the larger one, as you can begin seeing in the 1986 catalogue (Virtual Museum > Cylinders and regulators > Cylinders).
SALVAS SHARK - The pneumatic Trident spear gun of 1966 was followed, after one year, by the Super Tident, produced completely in stainless steel, for the most demanding clients. These cannot be found anymore, so it must be said that its production was very little.
MARES - Also the Vico Jet De Luxe of 1967 has been proposed the year after in a limited series all in stainless steel, as it is clearly demonstrated by its weight: 2.600 grams against .275 grams of the standard model (Spean Guns > Mares > Vico Jet De Luxe stainless steel).
DIVING HOUSINGS FOR UNDERWATER VIDEO OPERATORS - During the pioneering years, we saw any type and model, but one is unique for its brilliant simplicity. Rossella Paternò described it in her fascinating article about the incredible life of Leni Riefenstahl, incomparable photographer and director during the years preceding the Second Wolrd War (Hds News, March 2016). This housing was built from a cut soccer ball; the camera was positioned inside, with the porthole built with a thick glass, framed and bolt for watertight seal. It functioned perfectly and, for the first time in the world, the divers during the Berlin Olympiads in 1936 were filmed underwater.
CRESSI - In the USA they call it HOOKAH (Surface Air Supply). It is an open helmet supplied from the surface via a floating air hose. It is still used for recreational dives in small depths. In Europe it is not known so, it is a wonder to discover in the first page of the old Cressi catalogue-price list in 1947 called "diving bell" and listed under the title "diving half helmet". Price is not shown (Technical > Catalogues and logos of diving manufacturers > Complete catalogues - 1947 Cressi catalogue).
PORPOISE -It is the first world regulator with one single hose, officially presented in 1952 in Australia. Its prototype dates 1949, when the CG45 of Cousteau was just marketed. At that time, no one suspected that someone could develop small, practical and simple regulators, instead of the 2-hose bulky ones. "The Porpoise" book, edited some years ago in limited copies, tells its story with lots of interesting details but it is sold out. Recently, there has been a reprint of 50 copies. You can try to have it by writing to Mel Brown <firstname.lastname@example.org>.
SOS - DCP decompression instruments (bend-O-meter) with plastic (kralastic) housing had, in the first years, a band positioned between two small metal arches, blocked in spaces made at the housing outside. These spaces often break so, in 1964 this system changes and the band become a belt loop, inside the housing. This allows to date with more accuracy one’s own instrument.