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A Fascinating RED Rolex Submariner Prototype
This is an extremely rare Rolex Submariner Prototype [Reference 1680] and it is owned by one of the most fascinating Rolex collectors in the world–Philipp S.
Philipp is not only a Rolex collector, he says he is addicted.
Technically this Submariner is referred to as a NON-Minute-Track Submariner with Tritium Indices. This Rolex Submariner also referred to as a Red Submariner because the SUBMARINER designation is red. Actually on this version the red is laid down over a white print. This overprinting process was done to make the red pop more.

photo credit to Jakes rolexmagazine