RCA 211 Tubes Matched Quad

Hello,

I WILL NOT BREAK UP THIS QUAD.

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 GE's are for sale in another add.

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%