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(!!!!) (Single) 5691 RCA branded GE red base black plates NOS 1960's a few vertical scratches on base (2.1ma/2.3ma)
(!) (Best Value Single) 5687WA Sylvania JAN used/good faded printing 1970's (31/35.8ma)
(!!!) (Recommended Single) 5691 RCA Red Base branded Westinghouse black plates used/good 1960 (1.8/2.1ma)
(!!!!) (Best Single #2) 5687WA Sylvania NOS 1960's (34/35ma) (Same Gm)
(!!!!) (slightly microphonic pair) E182CC=7119 Philips Miniwatt SQ Holland NOS large "O" getter halo 1962 (35/36ma and 36/34ma)
(!!!) (Best Single #2) 6X5GT=VT-126B RCA black plates NOS 1943 (52/40 and 56/40) (Best Sound)
6973 RCA gray plate used/good 1960's (33.8ma)
(!!) (Best Single) 5687 Tungsol rebranded CBS black plates "U" getter NOS 1950's (38/48ma)
(!!!!) (Best Single) JHS-5687WA Sylvania NOS 1966 (46/48ma) (Highest Ma and Gm)
(!!!!) (Best Pair #2) 12AX7A RCA ribbed plates NOS 1965-1968 (1.4/1.0ma and 1.3/1.1ma) (Fender Rogue, McIntosh)
(!!!!) (Best Pair) 5751 RCA black plates NOS 1976 (2.5/3.1ma and 2.5/2.8ma) (Best Audio Grade 5751)
(!!!) (Best Single) CK5687WA Raytheon black plates "O" getter like new 1960 (35/38ma)
6F6G RCA Cunningham used/good 1947 (31ma) (Gm like new)
5879 RCA triple mica "O" getter halo used/tests like new 1962 (1.5ma)
(!!!) (Best Pair #2) 6973 RCA black plate NOS and like new 1959 (44ma and 42.5ma)
5879 RCA branded GE NOS 1974 (2.3ma)
6AN8A RCA gray plates used/tests like new 1960's (16.6/12.4ma)
5Y4GA RCA NOS 1963 (54/40 and 57/40)
(!!) (GOOD VALUE SINGLE) 5687 Tungsol rebranded IBM bronze plates "U" getter used/good 1959 (29/36ma)
(!!!!!) (Best Overall Pair) JAN-CRC-5V4G RCA NOS black plates 1958 (61-62/40 and 62-62/40) 1-2% matched (next best to GZ32 Mullard UK)
