I got this watch at a local estate sale. It works after a light service. I could not identify the movement date code and am really interested in the year and model of this fascinating watch. Having gone through some of the ads you have on this wonderful resource website, I think it is Model 154 from the 1925 ad but this watch does not have the sapphire crown (It is flat). I am an amateur watch collector / enthusiast.
Movement Serial No.
Case Serial No.