The "A" in "MADE IN U.S.A." has either a dot or a dash after it. Early ones have a dot. This applies only to non-luminous dials with "MADE BY WESTERN CLOCK CO., . . . " at the bottom of the dial.
Lettering at Bottom of Dial Dash after the "A":
The "A" in "MADE IN U.S.A." has a dash after it. Starting ca. mid-1935.