Mine has this too and I was a little worried until I looked it up and found out it's a common thing. Here's my 5167 visiting the Geneva Salon. I regret not buying the brown rubber after seeing this thread now.
Stunning... This is what I am hoping will be my next piece. I have liquidated a few of the pieces in my collection just to be ready for when one pops up for sale. Beautiful, thank you for sharing.
Nice pair sir. You should also post in https://omegaforums.net/threads/hav...n-a-different-color.95962/page-2#post-1303559