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1 X 12AU7 TUBE. NEW OLD STOCK IN ORIGINAL BOX.
BRAND: RCA. 1960s PRODUCTION.
GREY PLATES, SQUARE GETTER.
TESTED IN AMPLITREX AT1000 TUBE TESTER:
80/89% EMISSION (EM) 81/100% TRANSCONDUCTANCE (GM) 0.2/0.2mA/V GAS