Vintage mystery Rear adjustable peep Aperture flip back rifle sight OLD custom?

Ladder Sight Parts Vintage

Vintage Rifle Carbine Ladder Adjustable Rear Sight Gun Parts! Exc. Cond! COOL!

Stevens Model 1894 32RF Long Single Shot Rifle Front and Rear Sights with Riser

Vintage Air Rifle? Pellet? Rear Peep Sight Adjustable Windage Unknown Model (#3)

Chinese SKS Rear Ladder Field Sight With Slide NOS Replacement Iron Site

Bellmore-Johnson Tang Sight for Winchester 94 rifle - Dark gray/black textured

Redfield No. 70 HT Micrometer Rear Peep Sight Savage 6 Stevens 76 Gunsight Rifle