This one arrived a couple days ago from the U.K.
It is a 1915 3/0 Waltham 31mm,I'm going by the movement serial #20305049 on the year.
It is a Dennison Moon 10k gold plated case,since is a gold plated case there are no hallmarks.
The dial says Waltham U.S.A. and it says "Swiss made dial"on the top.
I'm assuming this watch was made in England for the U.K. market by Waltham.