World first: A helium release valve built into the crown. Engineer Hydrocarbon NEDU.

World first: A helium release valve built into the crown. https://shop.ballwatch.ch The Engineer Hydrocarbon NEDU represents major technological innovation in the design of diving watches. Dedicated to the Navy Experimental Diving Unit (NEDU) – a United States Navy unit responsible for rolling out operational diving and decompression rules for the US Armed Forces – the NEDU timepiece is a tool watch of the highest order, featuring extraordinary water resistance and technology strong enough for military missions. Since 1891, accuracy under adverse conditions. Be yourself.