I have a trench watch which I cannot establish the movement. Any help welcome.
The movement has no markings apart from 15 jewels and Swiss made. It measures 25.1 mm.
The case inside states: 925 (silver) and s for 1913, as well as London import. In addition in has a AB marker which I believe stands for Arthur Baume for Baume & Company.
Here some pictures:
Thank you for your help.