Rolex® calibre 620 hour wheel ht. 1.40mm
Genuine, Rolex ® part # 3599 cannon pinion ht. 2.49mm fits Rolex® 600, Rolex®620, Rolex®635
* 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.