Hi Julian,
at that time, in the earlier 19 hundreds, a 12''' movement certainly would not be considered ladies size. The early Calatravas were even smaller .... so in my book it's a men's size movement when speaking about wrist watches. And 33mm was about normal.
12''' remained the "golden rule" size for a considerably long time - later slowly growing to 13''' for mens watches - but remaining
12'' for a long time for mor eleegant (and flat profile) watches.
Can you imagine what a wonderfull elegant chronograph could be dessigned with this movement - let's say in a 36-37mm case.
That would be an absolute dream - with well designed case and not to wide bezel - slim case band....
Best regards
Suitbert