Seeking some information and advice. A neighbour has asked me if I know anything about these watches and sent me pictures of this specific watch that belonged to his father. I know very little aside from the G.S.T.P supposedly stands for General Service Time Piece. It doesn't currently work but I'm certain I can resolve that.

The questions asked:

1. Would it be of interest to a military museum?
2. Value in its current state?
3. Value if sympathetically restored?

Many thanks in advance.