John I. Peatfield, Arlington, Mass. was issued a patent on July 15, 1902 for this very complex perpetual calendar mechanism.
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16 March 2026
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John I. Peatfield, Arlington, Mass. was issued a patent on July 15, 1902 for this very complex perpetual calendar mechanism.
The calendar movement spring is wound once a year. The intricate calendar mechanism and the Seth Thomas No. 10, 8 day lever timepiece, two spring move...