Rolex® calibre 1030 cannon pinion height 2.43mm
Genuine, Rolex ® part # 4324 upper pallet hole jewel
* 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.