Rolex “Twinlock” and “Triplock” crowns

One of the most important and unique features of the Oyster case is its famous crown. The “Twinlock” crown is used on all regular models of Oyster cases.

The latest “Triplock” crown, illustrated on the picture, is used on the Rolex special purpose watches such as:

Ref. #5512-5513 – Submariner

Ref. #1680 – Submariner date

Ref. #1665 – Sea-Dweller

Ref. #6263 – Cosmograph

Ref. #6265 – Cosmograph

The same crowns are used on Tudor models:

Ref. #7016 – Submariner

Ref. #7021 – Submariner date

Ref. #7031 – Oyster date chronograph

Ref. #7032 – Oyster date chronograph

Ref. #7149 – Oyster date chronograph

Ref. #7159 – Oyster date chronograph

Ref. #7169 – Oyster date chronograph