Genuine Omega® clutch wheel, part number 1107, fits Omega® 27 CHRO, Omega® 27 CHRO C12, Omega® 27 CHRO PC AM, Omega® 320, Omega® 321 Omega® 110 pendulum-escapement and 5 hammers at

pendulum-escapement and 5 hammers at side (chains included)

Omega® 681

Generic (not genuine) Bezel Insert to fit Rolex® case numbers 16600

Mastertime 110

The external diameter of the spline is 3

Genuine Omega® clutch wheel, part number 1107, fits Omega® 27 CHRO, Omega® 27 CHRO C12, Omega® 27 CHRO PC AM, Omega® 320, Omega® 321 Omega® 110 pendulum-escapement and 5 hammers atGenuine Omega clutch wheel, part number 1107, fits Omega 27 CHRO, Omega 27 CHRO C12, Omega 27 CHRO PC AM, Omega 320, Omega 321 * Perrin Supply Ltd is independent of and not affiliated with or sponsored by Omega. Omega warranty does not apply to parts supplied by Perrin Supply Ltd.