The minimum for a good tube is 44, and these test at 71 and 69, so they are fairly well matched. They are identical, with a date code of 7326, which matches the boxes.
Item Tag: 2 Tubes
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Quad 4 Conn by RCA 12AU7A ECC82 Tubes, Closely Matched, Clr Top, Lg Pl, #2
From a larger lot of RCA / Conn tubes mostly from the 50s/60s. Tube are matched by Gm. Power tubes like the 6L6 are tested only with the 686 which includes plate current (Ip), shorts and gas tests.
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Pair, RCA Radiotron Type 5814A Radio/Audio Tubes, NOS
One tests at 110% of the specifications for emission Em, and 109% of the specifications for mutual conductance, Gm on one plate. The other plate tests at 100% Em and 100% Gm. The second tube tests at 110% Em and 109% Gm on on plate and 112% Em and 109% Gm on the other plate.
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GE JG 6072A Tubes Two Mica Short Black Ribbed Plate Halo Foil Getter NOS Pair
Up for sale is a pair of GE JG 6072A double mica short black ribbed plate with halo foil getter NOS in original boxes.