3 Westinghouse Black Plate 6CG7 6FQ7 Vacuum Tubes With Shields Lot Of Three Isherwood but the spine is in

but the spine is in fine shape with no loose pages

Not sure if there was ever a dust jacket

respectively where new/nominal is within one standard deviation of 5000

Fidelity is good

Tube Two lacks most markings and I believe it was military surplus and had its markings removed as memories of the war were a little too fresh

3 Westinghouse Black Plate 6CG7 6FQ7 Vacuum Tubes With Shields Lot Of Three Isherwood but the spine is inThis trio of Westinghouse black plate 6CG7 6FQ7 dual triodes was tested on our Paul Hart calibrated TV7 U for shorts, gas and transconductance. There were no shorts or gas and they measure as follows: 66 65, 72 76 and 92 90 where minimum (65%) is 50 50 and 100% is 77 77 These tubes have copper support rods; top, harp shaped getters and shields between the triodes for reduced cross talk. I have played them with adapters (not included) in my Radio