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6202 GE branded National NOS 1960's (51/40 and 51/40)
6202 RCA NOS 1972 (52/40 and 54/40)
EC88=6DL4 Valvo branded Amperex Germany NOS 1972 (11.5ma)
EM 2.5=866A Electro-Magnetic Products Chicago like new 1974 (60/40)
EM 2.5=866A Electro-Magnetic Products Chicago like new 1991 (56/40)
