@Tophership
Look for case reference 2846/2848/2849 for a full rotor caliber 50x. The caliber 503 with the date window at 3 isn't too hard to find.
For a bumper calibers you'll find several styles, with or without date windows:
2576, 2657, or 2766 - 344, no-date, sub seconds
2577 - could have a 342 sub seconds no-date, or a date-at-6, center sweep seconds, 353 or 355
2757 or 2627 - 353 or 355, date-at-6, center sweep seconds
2767 - 354, no-date, center sweep seconds
That should get you started. There are a few more references, but I forget what all the possibilities are.
EDIT: you won't have much luck in the 60's - the 50's were the decade for black waffle dials.
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