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(!) (Best Sylvania) 6K6GT Sylvania chrome top NOS 1956 (41.2ma)
(!) (SINGLE) CK-5755=420A Raytheon clear top NOS 1960's (1.4/1.3ma)
(!) (SINGLE) JAN-CRP-5755=420A Raytheon clear top NOS 1965 (1.3/1.5ma)
(!) (SINGLE) JAN-CRP-5755=420A Raytheon clear top NOS 1965 (1.6/1.5ma)
(!) (slightly microphonic) JAN-CRC-6SL7GT RCA NOS black plates 1951 tilted glass (2.0/2.2ma)
(!) 6F6G=VT-66A Sylvania used/tests like new 1940's (45ma)
(!) 6F6GT GE Coronado NOS 1956 (36.8ma)
(!) 6F6GT Sylvania Philco NOS 1950 (43.5ma)
(!) 6SL7GT RCA burgundy base NOS 1951 (1.7/1.8ma)
(slightly microphonic) 6SN7GT Hytron NOS 1948 (7/8ma)
(slightly microphonic) 6SN7GTA GE NOS 1952 copper grid posts (7.4/10ma)
43 National Union NOS 1950 era (75/58)
43 Sylvania NOS 1947 (71/58)
6B4G Raytheon NOS 1950 era (94ma)
6B4G Sylvania rebranded Delco NOS separate plates 1952 (81ma)
6B4G Sylvania rebranded RCA used/good 1953 (77.5ma)
6B4G Zenith by Sylvania NOS plates connected 1940's (123ma)
6BH6 RCA black plate NOS "D" getter halo 1951 (5.1ma)
6BH6 RCA black plate NOS "D" getter halo 1961 (6.3ma)
6C8G CBS NOS 1950's (like RCA) (3.7/4.1ma)
