Swiss Made Rolex Mainspring for Caliber 620, 630, 635, 640, 645.
Mainspring Height: 1.40
Mainspring Thickness (Strength): 0.090
Mainspring Length: 300
Barrel Diameter: 8mm
***Time Connection II Inc. is independent of and not affiliated with or sponsored by Rolex Watch U.S.A. Inc. Rolex warranty does not apply to non-genuine parts supplied by Time Connection II Inc.***


