Aftermarket Replacement New Gold Plated crown.Diameter of crown 7mm, tap 9. Diameter 7mm * Tap 9 Tube sizes Overall length 6,3mm*Thread case 3mm*Thread crown 5mm Crown sizes Diameter 7mm*Depth 4,2*Tap 9 (0,9mm) Will fit to case ref. 16518,16523,16528,16613,16618,16803,16808,116518,116523,116528,116613,116618,116713,116718 This is replacement crown for 24.703.8 and tube 24.7030.0 Please use loctite for fitting tube as you need your watch waterproof Please feel free to ask any questions