Has a very classic nautical feel, with the Roman numerals and of course the coloring of the strap, and moon phase. Reminds me of a lot of Ulysse Nardin marine line.
Discussion
It’s called an officers case, which refers to when pocket watches were fitted with lugs so that officers in the field could wear their pocket watch on their wrist
It has a clamshell rear opening that showcases the movement on the backside