My dad bought a red sub 1680 in ~1969. It was worn for several years until he decided it gave too much of a snobby vibe to his colleagues. It sat in a safe until after his passing and I decided to bring new life to it in 2016. From the research I have done, it is a 225XXX serial dating it to 1969. Original MK1 dial. Meters before feet. Closed 6's.

I had it serviced in 2016 to give it a physical, make it turn it's head and cough...yada yada. It's band was after market so I had it replaced with an Stainless Oysterlock Rolex band. The crystal was replaced with new Acrylic crystal. Other than those two modifications, it just needed normal servicing and cleaning.

It has been interesting to research this watch, and this article has the most comprehensive overview I have seen.

Does anyone have a piece that matches the details I mentioned above? It seems like it's difficult to find one with similar details.

I would appreciate any feedback.