ZENITH Defy Double Tourbillon El Primero 9020 46mm Watch necklace It is powered by the

It is powered by the automatic Caliber 6R35 movement

Maximum length: 16 1/2 inches

It is equipped with a silicon balance-spring and innovative non-magnetic components that make this calibre more than 10 times more resistant to magnetic fields than the ISO 764 standard

The 42mm case houses a black dial with black Swiss Super-LumiNova accents and a date window

Its timeless design ensures it remains a cherished addition to your jewellery collection for years to come

ZENITH Defy Double Tourbillon El Primero 9020 46mm Watch necklace It is powered by theA limited edition of 10 pieces, the DEFY 21 Double Tourbillon Sapphire is crafted in a 46mm transparent sapphire case showing the 1 100th of a second chronograph with a 60 second tourbillon driving the time and a 6 second tourbillon driving the chronograph in a special "starry sky" movement decoration.