Caliber: El Primero 3600 (Chronograph), El Primero 3620 SK (Skeleton), El Primero 3630 SK (Tourbillon Skeleton), Elite 670 (Skyline 36)
Functions: Hours, minutes, chronograph, date (Chronograph); Hours, minutes, running 1/10th-second indicator, date (Skeleton); Hours, minutes, tourbillon (Tourbillon Skeleton); Hours, minutes, seconds, date (Skyline 36)
Power Reserve: Approx. 60 hours (Chronograph), Approx. 50 hours (Skeleton, Tourbillon Skeleton, Skyline 36)
Winding: Automatic
Frequency: 5 Hz (Chronograph, Skeleton, Tourbillon Skeleton), 4 Hz (Skyline 36)
Chronometer Certified: No
Tim Jeffreys
2026-01-19 16:00:00