Matched pair Sovtek Russian Military 6N3C/6L6GC beam power tubes. Date codes both tubes are 9105, 5th week of 1991. Gray plate. Single bottom getter.Tested with a serviced and calibrated Hickok 532. 5400mhos 67.8 ma. 5500 mhos 68.8 ma. 5000mhos is average new. Guaranteed as described.