The Zenith Defy El Primero 21 made its debut at BaselWorld 2017, honoring the brand's long history of exceptional chronographs. Its powerful El Primero 9004 movement can accurately measure up to 1/100 of a second. This watch also marks the return of the Defy name for Zenith. The reference 45.9001.9004/78.R581 boasts a luxurious diamond-set white gold case and a unique openworked dial. Completing the look is a stylish rubber strap with an orange fabric detail. This particular version, created in collaboration with Swizz Beatz, was released in late 2017 as a limited edition of only five pieces.