The UN Marine Chronometer model line enjoyed numerous iterations. I quite like some of the first pieces. All I believe were inspired by the original Ships Chronometers from the mid-20th Century. I found one of these at a dealer in California 25 years ago....
Hamilton Type 22 (with a pocket watch movement), hard to date but probably from the 40's but unsure about military issuance, similar to this one (sorry no pictures, source web): A kirowa russian, quite recent, let us say 70's full set, like this one (sour...