22ct/18ct yellow gold $20 coin wristwatch. Made 1975

22ct/18ct yellow gold $20 coin wristwatch. Made 1975

Regular price £18,000.00 GBP
Regular price Sale price £18,000.00 GBP
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  • Brand: Piaget
  • Made: 1975
  • Model: $20 coin watch
  • Reference: 900B
  • Calibre: 9P
  • Movement: Manual 
  • Material: 18ct yellow gold
  • Features/complications: Hinged case within a United States of America $20 gold coin
  • Dial: Yellow gold dial with outer minute track featuring black printed hour markers  with baton shaped hands
  • Case dimensions: 35 mm
  • Bracelet/strap: Leather strap
  • Accessories: N/A
  • SKU: 3104


    The coin watch is a fascinating niche area of horology. Originally the coin watch was dreamt up by brands trying to demonstrate their technical prowess in the ability to fit a movement within the thin confines of a coin. This was usually accomplished buy joining two coins together so there would be sufficient material within which a movement can sit. This was until 1957 at the Basel fair when Piaget unveiled their 9P movement showcased in a coin watch. A single coin was used, divided in half and hollowed out with a sprung cover that revealed the dial at the push of a button.