ZENITH Defy Double Tourbillon El Primero 9020 45mm Watch Eternity Ring it offers a GMT function

it offers a GMT function and a power reserve of approximately 6 months

All three-feature black ceramic cases and titanium hardware accompanied by military leather straps with contrasting topstitching

romantic hue that complements the brilliance of the diamond

514 carats

ZENITH Defy Double Tourbillon El Primero 9020 45mm Watch Eternity Ring it offers a GMT functionHigh frequency Haute Horlogerie in its most rugged form: the DEFY Extreme Double Tourbillon features a 1 100th of a second chronograph in a carbon fibre and rose gold case, with a 60 second tourbillon driving the time and a 5 second tourbillon driving the chronograph for ultimate precision.