For sale, original Rolex B7837-Y1 driving wheel over third wheel compatible with 1520/1525/1530/1535/1555/1565/1570/1575 calibres, complete with its blister. The item is used but tested and reusable, the caliber is mounted on Submariner, Datejust, Oyster Perpetual, Yacht-Master, Sea-Dweller, Air-King.
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