I bought and just received this early WWI 'Trench' wristwatch.
It was described as a "Beautiful WW1 1915 Marconi Officers trench watch"
On examining it, I saw no indication it was 'Marconi' or Rolex.
I asked the seller who had been told by two separate sources it was a 'Rolex' Marconi movement, he even gave me a link to another 'Marconi' watch on Ebay that has no marking either on dial or movement.
I know that seller, and he thinks all his 'unmarked' movements are from the top 5 manufacturers.
On receiving the watch, there is marked '68' beside the balance wheel on bottom plate. That is all I can see.
I checked Beguelin (Damas) its not that, I checked Gallet, its not that. Looks more like Fontainemelon. Did they make a '68'
Hope some one can help
Its a very nice piece, will post pictures after I can try to find movement and if any links to Rolex