Rolex® calibre 640 screw for stud cover
Genuine, Rolex ® part # 3517 escape wheel - conical pivots fits Rolex® 600, Rolex®620, Rolex®630, Rolex®635, Rolex®640, Rolex®645
* H. & W. Perrin Company Limited is independent of and not affiliated with or sponsored by Rolex®. Rolex® warranty does not apply to parts supplied by H. & W. Perrin Company Limited. Using generic parts may devalue your watch.