Does anyone have any info on these movements?
One guy says that these are Bulova-made movements, made in their Swiss factory in the early 1920's. I agree with the date as being pre-April 1923, but I wonder if they use some other manufacturer's ebauche? I can't find a match at all on Roland's site using the advanced setting, maybe someone has a match.
(BTW, the triangle stamp in no.1's balance well is not a date mark!)
Hairspring stud for no.1.
Keyless works for no.1.