In 1971 in Geneva Switzerland I purchased an 18K Rolex Cellini with a Rolex Crocodile Band. This was purchased as a gift for my father and I bought another Rolex Crocodile band ina little darker shade of brown as a replacement band for the watch. Well, the original band has worn so well and was worn so little that the replacement band is still in its brand new never worn condition. I have been interested in selling the watch and the new unused band and someone asked me to tell them what was stamped on the buckle part of the bands, and both bands are Rolex SS with gold plate. From the serial number on the watch itself, I believe that it was made in 1968.
I haven't been able to get pictures posted on this site but I'd be happy to send pictures to another email address if you want to see them. I can also take more pictures if you want to see some detail that I've missed.