One in stock in white box. Great sounding tube with tonality somewhere between Mullard short plate ECC83s and RCA 12AX7As.

NOS in original boxes.

NOS in original boxes with various brands such as Lindall, RCA, Raytheon, Realistic, etc.

Original boxes. Labeled and boxed as RCA, National, etc..

 NOS in white boxes.  ca 1960 original Tesla ECC83/12AX7s. Very clean tone. A little less bright than the average 12AX7.

Mike, thanks for the tube recommendations. The Tesla ECC83 sounds awesome in V1 of my MAZ 18 NR. Ryan

VERY nice guitar amp tube in this price range. These break up earlier and are a little less bright sounding than other 12AX7s. Perfect for Marshalls, Voxes and clones of these amps. Sound nice in Fenders and Fender clones too. Limited supply on hand. Various tube markings including United, Pinnacle, RWN, Tesla, Siemens, Dumont, Amperex,Telefunken, etc. WHITE boxes.

NOS in original box. Labeled and boxed as CEI. 

Here's the same tube that arrived in bulk packaging, and with a different CV number. https://www.kcanostubes.com/node/808#overlay-context=content/nos-sylvani...

We're lucky to have found more of these super cool British Military tubes. NOS in original white military boxes. "Box Plates" version. Comes with it's own cool pin protector (just pull it off with your fingers!)

NOS in nice original boxes. 1950s/60s. Nice smooth tone, a little less bright than the average 12AX7.

Great in guitar amps.

$28