Extremely rare and very fine dead center-seconds mantle regulator with one-second constant force detent escapement. Honor Pons, invented and executed in 12 months (Sept. 24, 1803 - Sept. 23, 1804)
Anonymous (not verified)
23 October 2024
Extremely rare and very fine dead center-seconds mantle regulator with one-second constant force detent escapement. Honor Pons, invented and executed in 12 months (Sept. 24, 1803 - Sept. 23, 1804)
Precision Timekeeper with 1 Complication; Honor Pons, invented and executed in an XII (Sept. 24, 1803 - Sept. 23, 1804) Extremely rare and very fine d...
