Antique ladies wristwatch, diamond, 'Platine' with a goat(?) or stag(?)

by Cindy
(Chilton, Wi USA)

Wondering who made this estate piece I got. Wonderful old watch, high quality, about 1 TCW diamonds (nice, old but not mine cuts) and genuine saphhire on winder.

It's filigree, and has 28 diamonds altogether prong set. Weighs about 4.9 dwt (just the case). Is there more value to it than scrap? It's marked on the back of the watch case with a number, 'Platine' and a hallmark of a goat or stag or deer or antelope (???) head. My friend thought possibly an English hallmark....help.....?