Product Description
Balance Staff Fits Rolex® caliber 600, 620, 630, 635, 645 NA
These models have been manufactured in 3 different hairspring sizes Collet size .40, .50 and .55. We carry only .40 and .50. please select the correct size.
Swiss Made
Fits Caliber 600, 620, 630, 635, 645, NA
Non Original Part
***WatchMaterial is an independent part supplier of aftermarket watch parts. WatchMaterial is not affiliated with or sponsored by Rolex® Watch U.S.A Inc. Rolex® warranty may be voided by using generic aftermarket parts.***
