It's a decent sized stirling watch. We have a couple ads from 1923 and 1924 showing this watch. The 23 I believe says 16 jewel and mentions stirling. The 1924 is the Nurses watch and has a sweeping seconds hand but does mention stirling and 16 jewel as well.
No movement date code and a 3 digit serial number on the silver case.
The really thin wire lugs are throwing me off. Maybe it is a ladies Nurse without a seconds hand, but that case doesn't seem to have these lugs either.