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There will be a reference number inside the case-back, unfortunately I can't read it in the photos. The movement serial number indicates approximately 1956 production. Caliber 267 obviously, which is part of the venerable 30mm movement family.
I recommend flipping the watch around in the timegrapher, so the crown fits inside the recess of the spring-loaded plastic piece.
I believe the upside down number is 15246428 - is that the serial number?