This is apparently a Ladies pocked watch that was converted to be worn as a wrist watch. No date symbols on the movement and the only serial number is on the case. Currently runs and stops so needs a good cleaning.
Case is 25.78mm dia. 8.16mm thick
Crystal is 19.71mm
With the 20 year warranty on the case I am assuming that it is 10k gold filled
20 YEARS indicated gold fil or Rolled Gold Plate Warranty, as to the time guarantee before base metal would not show through the plating. Before 1924 GF or RGP cases were marked as to quality & thickness with either 5-10-15-20-25-30 year warranty . After 1924 cases are not guaranteed but are marked with the 10-14-etc as quality marks of the GF or RGP, as they are today. The American Standard Globe Symbol does not appear in my reference book.
In reply to So are we finally starting to by mybulova_admin