ROLEX Genuine 531-0 Crown 5.3mm Original Watch Repair Part 1.5 Rotation Verified. Please read carefully before purchasing. This is a genuine Rolex 531-0 crown, measuring 5.3mm in diameter. To ensure a secure fit and long-term functional reliability, this crown has been specifically selected and verified to achieve approximately 1.5 rotations (clockwise) when tested on a new tube. This part offers superior technical value for restorations, as it exceeds the typical 0.5 to 1.0 rotation range often found in pre-owned crowns. By prioritizing a higher rotation count, this component ensures a more secure screw-down seal for your luxury timepiece. The functional condition of this crown has been thoroughly verified. It is confirmed to thread onto a tube and rotate smoothly without issue. Additionally, the internal spring mechanism has been tested; the spring compresses and extends correctly, and the interface for the winding stem does not slip. Please note that rotation measurements are conducted using a new tube; if the part is paired with a worn tube, the rotation count may decrease. Compatible Winding Stem Series: 10, 11, 12, 14, 15, 16, 20, 21, 22, 30, 31, 40, 41, 72, 7750. We politely encourage buyers to review the photos carefully before purchasing. Please review all photos carefully. The item shown in the photos is the exact item you will receive. Buyers in the U. For International Buyers (excluding the United States). This item is also listed on other marketplaces. In rare cases, an item may become unavailable due to timing differences.