There is a way of finding the maker of the movement, but you’d need to find a watchmaker with the bestfit books. I think you’re about right on the date as the service watches at the beginning of WWI were pocket watches. Early wrist watches were ladies pocket watches with the hoops soldered on to take the strap.Don’t touch the lume! It radium based. A good find nonetheless
Definitely a pocket watch made into a wrist watch. Very nice one
If it were a converted pocket watch wouldn't the crown be located at the 12 o'clock position rather than the more conventional 3 o'clock position of a wrissmurfch?