Twinlock Case Tube #24-700 for old style Rolex Submariner 5513, 5512 and 1680,
Sea-Dweller 1665, Daytona 6539,6263, 6265, Tudor Submariner and Tudor Chronogragh.
100% Fit for Rolex original 7mm twinlock crown #24-700 (non drop stamp under the crown logo.)
Come with O-Ring Seal.
It is same as gen Rolex Twinlock #24-700 case tube using white copper to product.