Rolex Submariner 1680, with date and plexi glass; with a 504XXXX serial number this watch is from around 1977. Tritium dial and hands are in very good shape, the insert is about to turn a little blue. The 93150 Oyster band is the first/original band, but has a dent in the buckle, as you can see in the pics. This must be the best (priced) 1680 in Holland.