Mystery Numbers

I haven't been able to figure out the significance or useage of the series of numbers surrounding the face of the watch that are on that red and blue background. It appears this is a ring can be rotated around the face of the watch, judging from several of the photos.

My watch has the numbers 13 though 24 around the inner face so that one can readily use the 24-hour clock or "military time" if he so desires. But those numbers on the Rolex don't correspond to an application such as that.

Msybe I'll spring for one of these watches one of these days when I get enough discretionary income.

Russ