The sheet shows also the Newtsuit diving suite.
1987: the "Newtsuit" was developed by the Canadian engineer Phil Nuytten. The Newtsuit is constructed to function like a 'submarine you can wear', allowing the diver to work at normal atmospheric pressure even at depths of over 1,000 feet (300 m). Made of wrought aluminium, it had fully articulated joints so the diver can move more easily underwater. The life-support system provides 6–8 hours of air, with an emergency back-up supply of an additional 48 hours. The Newtsuit was used by Bruce Fuoco to salvage the bell from the wreck of the SS EDMUND FITZGERALD in 1995.
More info on this NEWTSUIT at http://en.wikipedia.org/wiki/Newtsuit
Turks & Caicos Islands 1996 $2 sgMS 1401, scott1197
Source: Wikipedia