Swiss 18 carat gold U.S. twenty dollar coin watch Circa 1960

Coin watch with 18K gold chain
–
A very fine Swiss 18 carat yellow gold concealed keyless watch set into a U.S. 20 dollar coin dated 1907, accompanied by an associated chain with a further 1881 U.S. 20 Dollar coin, made by Audemars Piguet in Geneva, circa 1960. Coin opening with a push piece concealed in the band. Matte silver dial with painted baton hour indexes and gold hands. A rhodium plated movement with Geneva striping decoration, 17 jewels, straight line lever escapement, monometallic balance adjusted to heat, cold, isochronism and five positions and self compensating flat balance spring. Dial, case and movement signed.
–
Diameter: 34.5 mm
–
Signed: Audemars Piguet Genève Swiss