Navy Canteen Dive Watch

An Elgin waterproof canteen dive watch.

The canteen watches were the first dive watches to be issued by the US Navy. Hamilton was the first model being issued around 1941 or so with a slightly different case design and spade hands. Elgin came next with basically the same case used on A-11 watches of the same period but with a unique screw-down canteen cap for maintaining water-tightness.
This a Zeno Navy canteen dive watch with 17 jewels ETA mechanical movement. As you can see, it's a remarkably accurate reproduction of Elgin canteen dive watch, right down to the dial patten, hands, crown system (including the chain), and case design.
Photo Credit: Hyunsuk's