Case has no markings on the back - Gold filled Symbol on movement looks like a rhombus with 10 marked in it??? I have put 1922 only so I can get this on the site for your consideration. I do not know the date. Stem and crown appears to be a replacement??
Edit: Avertisment Added: The advertisment is from 1922 add no 3 of 36 - Top "954", but this watch is 14kt white gold and the one I have is yellow gold- to me the case looks the same and the face looks the same.
Case is 24mm. Lug end to lug end is 27mm Hinged Case opens from the side
Edit: Changed date to 22 from 24