In reply to Paul Altieri.

I have a Rolex Model M5512/0 and the serial is 1596767 made in 1962. When I got it around 1988, it was missing the bezel, the crystal was chipped, and the face had to be redone. Underwood Jewelers in Jacksonville shipped it the Rolex Service Center in Texas. It also came with a jubilee bracelet. The stem also was replaced when I had it serviced by Rolex in 2021. I wear it daily and was curious about the value. I have no idea about the crown guards, I assume that the serial number let’s you.
Thanks for any information!
Mike Philips