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(!!) 12BY7 Sylvania coated glass NOS 1953 faded printing (21.5ma)
(!!!!) (Best Pair) 5751 RCA black plates NOS 1976 (2.5/3.1ma and 2.5/2.8ma) (Best Audio Grade 5751)
(!!!!) (Recommended Single) JG-6072 GE black plates triple mica "U" getter halo like new 1950's (2.5/3.1ma) (recommended for guitar amp or mic preamp)
102D Western Electric NOS 1954 large getter (0.7ma Gm=600)
(!!) (Single) 5965A GE 5-Star NOS 1969 (14.8/11.8ma)
(!!!!) (Best Pair #2) EC92=6AB4 Siemens Halske NOS branded Philips 1967 (9ma and 9ma)
(!!!) (Best Pair) EC92=6AB4 Siemens Halske Germany branded Mullard NOS 1964 (10.2ma and 10.6ma)
12SQ7GT Emerson by RCA used/good 1940's (90/60)
(!!!) (Best Pair) 6SC7 GE metal can NOS 1953-1955 (2.3/1.9ma and 2.3/2.1ma)
13EM7 Westinghouse Canada NOS same build as RCA 1970 (1.3/38ma)
1299=3D6 NOS Sylvania NOS 1953 (104/52)
1299=3D6 Sylvania used/good 1940's dirt over printing (80/52)
1299=3D6 Sylvania used/strong 1940's (100/52)
1299=3D6 Sylvania used/strong 1940's (90/52)
12A4 GE used/good 1950's (1 in stock)
12A4 US Brands NOS (0 in stock)
12AC6 NOS
12AD6 US Brands NOS (6 in stock)
12AD7
12AE6A Raytheon NOS 1960's (2 in stock)
