(!!!!) (BEST PAIR) 6973 RCA gray plate NOS 1960's - 1970's same build (48.5ma and 50.6ma)
(!!!!) (Recommended Pair) 6973 RCA NOS and used/good same build 1960's (40ma and 41ma)
(!!!!) 6973 RCA gray plate NOS 1975 (43ma)
(!!!) (Best Pair) 6973 RCA NOS same build 1960-1970 (40ma and 40ma)
(!!!) (Best Single) 6386 GE branded RCA NOS 1968 (10.2/10.8ma) (sold out)
6973 RCA black plate used/good 1950's (34ma)
6973 RCA branded Raytheon black plate NOS 1960 era (51ma)
6973 RCA gray plate used/good 1970 era (56.5ma)
6973 Sylvania gray plate NOS 1970's (61ma)