The Danish ‘2 bolt’ divers helmet by Peter Hansen Hessing.

The danish 2 bolt divers helmet was invented by Peter Hansen Hessing. As a diver working for the danish salvage company ‘Svitzer’ he had learned to dive with the antique ‘Sadler’ diving equipment. The Sadler was in fact an open helmet with a jacket attached to it, based on the very first design of diving equipment. Peter Hansen Hessing used the Sadler helmet as the base for his own helmet and improved the design by giving it a breastplate which could be built to a ‘one piece’ suit with the use of a neck ring and 2 bolts. Pls see the chapter ‘Birth of the 2 bolt helmet’ for some more about this subject.