Thanks, I like radial placement of numerals, but like your outer track in white.
Any idea on a date?
Yours have a 16 sided back like this with "pat no. 2229979 ? Looks like someone has tried to get into mine with no luck sometime ago. Is this truly a screw off back or one made to appear so?
but FWIW, you have my permission to be the one to pry it from my dead fingers (or wrist) whenever that day comes!