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.
Purchased on a whim from a AD many years back. Base models in the day, but enhanced rotors, case backs and the porthole box. Made in limited sets in SS and RG.
I showed it to Herr Schnyder once but no details were forthcoming... he was distracted by a Freak promotion at the time Is it a UN? What year of manufacture? How many were made? [OK, at least 2 made ] What is the movement? Who made the case?