Help wanted in identifying WW1 wristwatch

[cx500-trike]

I recently bought a wrist watch, purley because I was after a 1959 wristwatch and it looked nice, and on recieving it I thought there was something not right for the year it was supposed to be. After some research it appears to be a WW1 trench watch as apposed to 50's watch, stamped date (as sold to me ) is the serial number I think. Can anyone help on the exact date and origins. I've attached some pics to help and as they are not that clear have roughly drawn the marks. I'll describe them as best I can.

There appears to be two sets. First set I presume are the makers marks for the case - 2 f's lying down on top of each other, a cursive x with lop in top right hand tail, 925 silver mark and standing bear (switzerland?).

The second set are possibly the importers marks - 0.935 in a box, JW, and 1959 with an N underneath. I can supply more info if needed. I would appreciate help in identifing this watch as I would like to know more about it's origions.

Please forgive my ignorance but I do not know a lot about watches and silver.

thanks in advance Gary

[antiquer]

Greetings Gary,
Yes, the standing bear is a Swiss silver guarantee mark, when the bear is in a shield of that shape, it is for silver of .875 and above. The 0.925 mark is also Swiss, telling the exact purity.
The lazy F's, 925 and X are import marks for Glasgow Scotland, the cursive X is the date letter for 1920.
It would seem that the last group and the JW are from the actual maker of the case.
May I ask how you created the marvelous graphic of the marks?
Cheers, AinA