This a genuine Rolex Lizard strap and 18k gold buckle from I believe the 1970s or 1980s. Many years ago I took it off a 50s Datejust to put on a bracelet and put these aside to save. Well, now it’s time to find a new home. It was on a watch, but you can tell it was never worn, never used. It measures 19.5 mm and would look great on a 19 or 20 mm watch. It works for either size lug width.