Rolex® calibre 90 upper balance hole jewel (0.07 / 0.80)
Genuine, Rolex ® part # 830 upper balance hole jewel (0.07 / 0.80)
* 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.