A couple of links that may be of interest for those that have not come across them already, http://www.britishpathe.com/workspaces/page/ww1-the-definitive-collection https://www.flickr.com/photos/photosnormandie/
@TexOmega gstp broardarrow. Ok The obvious clues. General service timepiece Brittish issue. Without checking the book that knows this. Jlc, are usually marked on the dial as shown. So going for broke... an Omega?
New arrival in a quickly cobbled together mount, now to find out what cockpit it may have originally resided in ?
Answer: outside "Tells" are the holes in dial at 3 and 9 It is a Smiths pocketwatch. of course, inside case back has the complete give away...."Made in England"
Hmm, a bit too early for an odd looking emoji Maybe a small "L" inserted between the 1 and 0? Or one way to cover up (elegantly) a mistake?
http://ihc185.infopop.cc/eve/forums/a/tpc/f/990103944/m/1021084431/p/2 https://amateurwatchmaking.com/tag/gstp/