- This is an after market product that adds a calendar (date) to a Model 57 movement.
- Joe Cohen owns the top watch (#137); Michael Edidin owns the lower one (#141). The numbers are on the movements. They are signed "W. Parker" with city "New York". A third calendar #140) has recently surfaced on eBay.
- Joe has done a lot of research on this calendar watch and he can provide details on its background. My job was to identify the AWCo movements to which the calendar was applied.