Case dated by s/n and movement stamp indicate 1938. Gold plated case and back. Dial is a little chalked and it's missing the gold cap off the crown. Band is a replacement braided leather I scavenged off a quartz ladies watch that is a reasonable (for now) visual repro of the 3 cord leather as seen in the 1939 ad included. Currently keeping time.
Seems to be a 1938 Montgomery.