Piaget Fine watch Golden

American 20 dollar coin from 1904, signed by Piaget, containing an ultra-thin watch, with a pendant mounted (sold without chain). 18K yellow gold. Diameter 35 mm. Mechanical movement with manual winding. Champagne watch face. Black markers and black hands. Watch given as a present in 1982. No Invoice.
Rare model. Very good condition and still working. With dustbag.
This watch can be worn as a collar (the chain will not be send with the watch)