tinker2
136
Royal Navy Chrono
Military history and my profession intersect in a big way, so I did a bit of research into my Lemania Series I nuclear submarine chrono that I acquired last year while living in London for work. I fell in love with the watch instantly (I already owned a series III). Visually, it is IMHO, gorgeous. Total tool watch, incredibly legible, and, because it spent most of its life underwater, not very harmed by the sun.

It has the Lemania cal. 2220 in it, a mono pusher movement that is almost identical to the Lemania 2310 (dual pusher), which is the same as the Omega 321 in the Speedmasters. This movement is good enough for space *and* good enough for a nuclear submarine (as well as the base movement for Patek Phlippe as Ch-27-70, and in VC, Dubuis). Here is this one, from 1962 (check out those springs!):

The seller, an expert in military watches, felt confident it was used on HMS DREADNOUGHT, the UK's first nuclear powered sub (the watch has no lume because the lume would trigger the on-board monitoring devices for radiation).
Sure enough, it's dated 1962 on the inner caseback, and DREADNOUGHT made her first dive in January of 1963. So... logic dictates that if a nuclear submarine watch existed at the same time of the only UK nuclear sub existed, the watch must have been on board.
Well, I spent some time digging, and eventually found this old Pathe film on the Dreadnought... Take a look at this watch-- I'm thinking same model, yes? On a bonklip (which they almost all wore at the time)

Pretty cool IMHO!!
This series 1 version is extremely rare, and I am guessing only the first crew or so of the Dreadnought had them. Only 6, maybe 8 are known to exist, as opposed to the asymmetrical cased Series 3, which started production mid-60s, and might number 200-300 made. I have my 1967 version Series 3 below, next to the Series 1.
These watches get a *ton* of wrist time.