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I wasn't familiar with the Turn-O-Graph till I saw yours. Damn fine watch.
Nice find. Very cool piece of Rolex history with a rather short production run. The white dial version (which is famous for turning cream color) is talked about far more often as it has more differences in appearance compared to a white dial successor 16570. In addition to the different bezel engravings the white dial 16550 had white gold hands and hour markers. On the 16570 the hands and hour markers were outlined in black for greater contrast, and its production run was much longer. Only the bezel of the black 16550 seems visually different from the black dial 16570. Still great find and I would definitely prefer a black 16550 to a cream/white 16550. Again great find, enjoy it!
Maybe blasphemy here, but I'd prefer neither. They are one of my least favorite Pateks in recent years. But if I had to choose it would be the top one, I prefer the blue on the dial.
Congrats!!! Great find and a great deal. Love the Scuba. Looks like it was delivered on a strap. If it doesn't have the bracelet I'd call AP and look into ordering one. It looks great on a strap...but I love it on a bracelet! Again congrats Bro...awesome watch!!!