A friend took his 1680 White Submariner over the other day, he had it serviced and refinished on a regular basis by Rolex over the last few decades.
I looked at the case number and said it would have originally had a red dial, to which he said;
“now that you mention it.....”
He’s still kicking himself.
https://s5.postimg.org/gz5p1eeaf/6_F...A64315_C47.jpg