WEAVER 149 pivot mount base rear rifle scope WIN Winchester 70 postwar Magnum

Weaver Mounts #139 Pivot Mount Scope Base Fits Rear Base on Winchester 70

Weaver Mount Pivot Mount Base #147

Weaver Pivot mount Base #145

(1) weaver pivot mount base multiple sizes available (not sold as a lot)

Weaver #139 Pivot Mount Base w/h Screws for Winchester 70, .375 H&H Magnum

Weaver 147 Pivot Mount Base 48147 Winchester 70 670 770 Sears 53

Weaver Pivot Mount Base # 148 Rear Base Winchester Model 70 & Model 54