Selling two unknown brand 7591 vacuum tubes (#1 and #4).I've had these tubes on the shelves for many years. I no longer have an amp to use them and do not intend to buy one. Time to send them out the door. As you can see there is major discoloration and thinning of the getter on tubes #2 and #3. These two tubes are free. Tested on a Hickok 6000A Average new = 5100 Minimum = 3315 (65% of average new value) Tube 1 - 5750 Tube 2 - 5500 Tube 3 - 5000 Tube 4 - 6000
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