This circa 1960 manufactured Lyman No. 66 receiver peep sight has the slotted adjustment knobs, steel base and is marked "Lyman / 66W88" which indicates that this sight is for the Winchester model 100 semi-auto carbine & rifle. The overall condition is very good to near excellent with light wear and possibly some light oxidation staining. The mounting screws are sold separately and the box is not included. (file photo)
