(!) (#2 231D Best Value Pair) 231D Western Electric NOS 1953 (1.7/1.7ma)
(!) (Slightly microphonic) JG-5814A GE NOS triple mica "U" getter halo 1956 (10.2/10.4ma) 1-2% section balance (high Ma and Gm)
(read review) 12AY7 GE branded RCA gray plates "D" getter NOS 1954 (2.3/2.9ma)
(slightly microphonic) 6SN7GTA GE NOS 1952 copper grid posts (7.4/10ma)
1299=3D6 NOS Sylvania NOS 1953 (104/52)
1635 RCA coated glass NOS 1950-1953 (2 in stock)
231D Western Electric NOS 1953 (1.6ma)
2A3 Ken Rad coated glass low hours/test like new 1947 (read review)
2C51=396A GE "D" getter NOS 1950's rebranded United National 396A in 1987 (13.6/7.3ma)
328A Western Electric "small punch" NOS 1953 (5.5ma)
328A Western Electric small punch plate used/good 1953 (4.6ma)
5637 Sylvania NOS 1953 in white boxes (3 in stock)
6AH4GT GE used/good 1955 (20ma)
6AH4GT Hytron By GE "D" getter low/hours/like new 1950's (21ma)
6B4G Sylvania rebranded RCA used/good 1953 (77.5ma)
6BL7GT Sylvania low hours 1953 D = rectangle getter halo long scratch on base (33.5/37.5ma)
6BL7GTA GE gray plates NOS 1974 (47/53ma)
6BL7GTA Sylvania used/good 1960's (31/33ma)
6L6 RCA metal can used/like new 1953 (71ma)
GL-6072 GE 5 star triple mica black plates "O" getter halo 1962 like new (read review)