Gasket, primary cover for BSA 1939-1943 WD M20, C10 C11 B21 B23 B24 B25 B26 M21 M22 M23 M24; 1947 B31 B32 B33 B34 Tele fork, M20 M21 girder fork, C10 C11 tele fork; 1948-55 M20 M21 M33 rigid and spring, M21 AA model Original part number 66-7514 - front chain case joint washer (cork)
