5X4G Cunningham NOS 1946 (51/40 and 52/40)
5X4G Cunningham NOS 1946 (55/40 and 56/40)
5X4G RCA NOS 1960 (54/40 and 55/40)
5X4G Silvertone by RCA used/good (46/40 and 47/40)