Antiquorum Auctioneers Lot soldUSD 0CHF 0 (listed)EstimateUSD 3 266 - 5 443CHF 3 000 - 5 000 (listed) See all lots Piaget Antiquorum - Important Modern & Vintage Timepieces | Geneva, 10 May Movement Unknown Lot number 243 Diameter 35 Location Description PIAGET TWENTY DOLLAR GOLD COIN WATCH Piaget, 'Twenty Dollars 1900', movement No. 634763. Made in the 1980s. Very fine, 18K yellow gold $20 U.S. coin dated 1900 with concealed watch. Double case, coin opening with a concealed push-piece in the band, three-body hinged inner case. Satine gilt with painted baton indexes. Blued steel baton hands. Cal. 9P, rhodium-plated, fausses cotes decoration, 18 jewels, straight-line lever escapement, monometallic balance, self-compensating flat balance spring, shock absorber, micrometer regulator.