(!!) 12SN7GT RCA Honeywell black plates NOS 2 glass chips at bottom of tube 1957 (9.09.2ma)
(!!) 12SN7GT RCA Honeywell black plates used/good 1957 (7.6/8.4ma)
(!!) 12SN7GTA GE branded RCA coin-base NOS 1970's (9.2/9.4ma)
12SN7GT RCA coated glass NOS 1950 (7.6/8.6ma)
12SN7GT Sylvania chrome top used/tests like new 1955 (8.2/8.6ma)
12SN7GT Sylvania NOS 1960 (7.5/8.0ma)
12SN7GTA GE Honeywell like new 1960's (8.4/8.5ma)
12SX7GT RCA NOS 1955 (9.6/12.4ma)
