2 X ECC88 TUBE. USED.

BRAND: MULLARD. 1960s PRODUCTION. B7G1/S2E DATE CODES.

GREY PLATES, HALO GETTER.

TESTED IN ROEHRENTEST TUBE TESTER:

91/97% 13.626/14.481mA EMISSION (EM)

96/76% 14.339/11.339mA EMISSION (EM)

CH168U1