(!!!!) (BEST PAIR) JAN-CRC-1619 RCA NOS 1952 and 1956 (51.4ma and 51.6ma)
(!!!) (BEST PAIR 1943) JAN-1619=VT-164 RCA NOS 1943 (55ma and 57ma)
(!!!) (BEST PAIR) JAN-CRC-1619 RCA NOS 1952-1953 (53ma and 55ma)
(!!!) (BEST PAIR) JAN-CRC-1619 RCA NOS 1956 (53ma and 55.5ma)
(!!!) (Recommended Pair) 1619 RCA NOS 1958 made for Westinghouse Canada (54.5ma and 56ma)
(!!!) (Recommended PAIR) JAN-CRC-1619 RCA NOS 1952 and 1956 (52ma and 52.5ma) (matched on Amplitrex)
(!!) (PAIR) 1619 RCA NOS 1975-1976 (49.5ma and 52ma)
