This is new old stock, never on anything. 1-3/8" across with 7/16" long stud with 10-24 thread on it on back for mounting, comes with the mounting nut also. Lens is plastic. Stimsonite 8, SAE B-60, R-28 on lens, Gulotta Bright Star IND. INC. No. 325 Made in USA on back. Measures 1-3/8" across. They are 45+ years old and have minor shelf and age wear. I am not sure what all models and years used this reflector. You will have to check your bicycle and see if it is the right one. They were used on many different ones through the years. Any questions please ask. Be sure to check my other auctions and my Ebay store for more hard to find items.

I do not take offers on my items, my prices are firm unless otherwise stated.