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1 X ECC81 / 12AT7 TUBE. NEW OLD STOCK IN ORIGINAL BOX.
BRAND: SIEMENS. 1960s RSD PRODUCTION.
GREY PLATES, HALO GETTER.
TESTED IN AMPLITREX AT1000 TUBE TESTER:
108/96% EMISSION (EM) 98/90% TRANSCONDUCTANCE (GM) 0.6/0.6mA/V GAS
CH165U1