Lyman No. 66 R12 side-mount peep sight ORIGINAL. This peep sight was originally produced for Remington Model 12 and 121 rifles, and also including the Winchester Model 61along with Remington 25 and savage 29. This No 66 R12 sight was taken from a Remington Model 12 (1922) and is in excellent condition. A veryaccurate rear peep sight.
