Verge Crown Wheel Key Winding 18K Yellow Gold Ornate Pocket Watch #8013

Verge Crown Wheel Key Winding 18K Yellow Gold Ornate Pocket Watch Approx. 48 mm in diameter, 18 mm thick Stamped SH JW with English Gold Hallmarks inside the case. Date mark of F with square box around it. 61.3 dwt / 95.4g The verge (or crown wheel) escapement is the earliest known type of mechanical escapement, the mechanism in a mechanical clock that controls its rate by allowing the gear train to advance at regular intervals or 'ticks'. Its origin is unknown. Verge escapements were used from the late 13th century until the mid 19th century in clocks and pocketwatches. The name verge comes from the Latin virga, meaning stick or rod.[1] Its invention is important in the history of technology, because it made possible the development of all-mechanical clocks. This caused a shift from measuring time by continuous processes, such as the flow of liquid in water clocks, to repetitive, oscillatory processes, such as the swing of pendulums, which had the potential to be more accurate.[2][3] Oscillating timekeepers are used in all modern timepieces. Very good preowned condition. Just authenticated and serviced by our watchmaker Comes with key Will be shipped fed ex with insurance in a gift box. AD10152021/17KCSSS