Omega® Crown (Waterproof, with split post attached), yellow, total length 3.77 mm AS 1778 The movement runs on a

The movement runs on a "C" battery

Not Non magnetic

Precision-machined brass regulators feature a compact rear entry design

roller to fit Jaeger LeCoultre® calibres: 815

Auto Beat Escape Wheel FHS 131/261 21 cm is an escape wheel specifically for Hermle 131 & 261 Auto Beat Movements with a pendulum length of 21 cm

Omega® Crown (Waterproof, with split post attached), yellow, total length 3.77 mm AS 1778 The movement runs on aOmega Crown (Waterproof, with split post attached), yellow, total length 3. 77 mm Omega Yellow Waterproof Crown with female post attached, square, diameter 3. 70 mm, fits tube 2. 00 mm, total length 3. 77 mm. Case numbers are unknown. *Perrin Supply Ltd is independent of and not affiliated with or sponsored by Omega. Omega warranty does not apply to parts supplied byPerrin Supply Ltd. Using generic parts may devalue your watch.