You are looking at an extremely rare genuine Rolex 18K gold 20mm "Big Crown" stretch riveted Oyster bracelet.

Once in a blue moon you may find a beat up original solid gold vintage oyster bracelet for sale, but your chances of finding a 20mm lug end 18K gold stretch rivet band from the 1950's or the 60's are slim to none - especially in this condition. The bracelet is Swiss made, according to the date code stamped on the inside clasp it was manufactured in 1954.  

The bracelet is full length with 12 links, on the watch it should fit a large wrist. The overall condition is good, especially for the age. There are obvious signs of use, of course, and minor rivet pin adjustments may be required by your watchmaker. Sold as pictured.

If you have the watch for it, you should not hesitate. Upgrade and complete your treasured 20mm lug end gold Rolex while you have the chance.  

Shipping will be with full insurance.