Up for sale is a strong matched pair (2 Pcs) of legendary vintage NOS GEC 6V6G beam power tetrodes, complete in white boxes. Manufactured in England by General Electric Co. Ltd. (G.E.C.), these rare tubes feature iconic black-coated glass envelopes and sturdy black bases. World-renowned among audiophiles and guitar amplifier enthusiasts for their lush harmonic richness, tight low-end dynamics, and exquisite soundstage depth.

Both tubes have been thoroughly tested on an Amplitrex AT1000 automated valve tester at full factory operating conditions. Anode current (Ip) and Mutual Conductance (uMhos) measurements alongside percentage performance ratings relative to nominal factory specs are detailed in the table below.