The Red Submariner, model number 1680, was one of the first Rolex Oyster Perpetual Submariners that incorporated a date function. I say one of the first Submariners as the 1680 Submariner was produced in two guises. The earlier models had the word Submariner written in red and the later in white. Up to this point the Submariner, having been produced for over 10 years with differing model numbers, never had a date function.