Change to 16710 tube gasket? (rubber to metal)

[George.Costanza]

Does anyone know the approx year that Rolex replaced / upgraded the rubber case tube gasket on the B24-5330 Twinlock to metal?

For context I am referencing the tiny gasket that sits between midcase and tube.

For bonus points, does anyone know why?

Thanks.

[SearChart]

The 5330 type twin lock tubes have only ever been used with a metal washer gasket in between the case and tube.

Older gmts were equipped with a 5320 tube, that doesn't have a gasket there at all.

[George.Costanza]

Originally Posted by SearChart

The 5330 type twin lock tubes have only ever been used with a metal washer gasket in between the case and tube.

Older gmts were equipped with a 5320 tube, that doesn't have a gasket there at all.

Thanks you Searchart, really appreciate your response.