Genuine Omega® sweep seonds pinion, height 4.74 mm, H1, part number 1253B, fits Omega® 550, Omega® 551, Omega® 552 5040 Series Ronda 400 Day Clock Suspension Unit

400 Day Clock Suspension Unit 18A can be identified in the Horolovar 400- Day Repair Guide and is the same as Unit 18B and 18C

35 mm plastic high center domed with lip

Screwdriver Sharpener Spring action holds screwdriver firmly in place

Omega® 266

Material: Seiko part number 401-039

Genuine Omega® sweep seonds pinion, height 4.74 mm, H1, part number 1253B, fits Omega® 550, Omega® 551, Omega® 552 5040 Series Ronda 400 Day Clock Suspension UnitGenuine Omega sweep seonds pinion, height 4. 74 mm, H1, part number 1253B, fits Omega 550, Omega 551, Omega 552 * 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.