ETA SA C102

Caliber C102 is an automatic movement manufactured by ETA SA in Switzerland, introduced in 2019. It measures 31mm in diameter and 4.15mm thick, operates at 28,800 vph with 28 jewels, and features a ball-bearing rotor with Incabloc shock protection. The movement includes a date complication and is offered with either a central seconds hand or an offset small seconds version positioned 8mm from center, which has caused some confusion in the market regarding caliber identification.