RCA 211 Tube Matched Quad

Hello,

Offered for sale is ultra rare matched Quad of RCA 211 tubes all produced in October 1942. I purchased these four years ago from a reputable source. I actually bought 3 matched quads from this source, two matched quads of RCA 211's and one matched quad of GE 211's.

The one quad out of the three that I have listened to for 4 years has been perfect. I expect the quad for sale in this add will perform perfectly as well. I will guarantee that they are operationally pristine.

The test data on the box is hard to read to me, but shown in the photos, which is why I provided the back story. Upon receiving this quad, I listened to them for a few days in Audio Note Ankoru II amps they were quiet and exceptional sounding and in balance.

Data off the boxes which has not been tested by me. I don't know what this data means or if i read it correctly, but its the best I can offer technically speaking. The tubes sound great and stereo image was in balance when I listened to them briefly.

Tube 1: . GM: 3.9 110%
Plate current: 103.1 108%

Tube: 2: GM 3.98 110%
Plate current: 100.8 105%

Tube: 3: GM 4.17 110%
Plate current: 109.7 115%

Tube: GM 4.13 114%
Plate current 101.6 107%