(!!) 5751W1 Sylvania triple mica "O" getter halo used/good early 1960's misbranded 12AX7WA (1.8/2.0ma)
(!!) 5814A RCA black plates used/good 1964 (7.2/8.4ma)
(!!) 6350 RCA NOS triple mica "U" getter NOS 1960 era (12.8/13.2ma)
(!) (1950's Single) 12AT7WA Sylvania black plates triple mica "D" getter used/good 1950's (6.2/7.0ma)
(!) (slightly microphonic) 5751 Sylvania rebranded RCA black plates triple mica "D" getter used/good 1950's (2.0ma/2.2ma)
(slightly microphonic) 5670 RCA NOS triple mica "O" getter halo 1961 (7.6/10.8ma)
(sold out) 6414 Raytheon triple mica black plates NOS 1950's misbranded E80CC National
12AT7=E81CC=6201 Siemens triple mica NOS 1971 (12/15.8ma)
JG-6189=12AU7WA GE triple mica NOS 1963 (8.6/10.4ma)
