Matched Quad of original Tesla E88CC.

Tubes are new, not used, tested NOS. same code
Made in Chechoslovakia in September 1974 according to "XS" code

came from large military stock, no boxes
frame grid, box anodes, gold plated pins,

these are 32 coded famous VRCHLABI plant Czechoslovakia
there is almost always the possibility that the tubes were used for a while, but I'm pretty sure that the tubes were never used, NOS
test strong, look great, came from huge military stock.
test very strong, perfectly balanced and matched, very high emission
 test results:
tube1 - 17mA/17mA
tube2 - 18mA/17mA

tube3 - 18mA/17mA
tube4 - 19mA/18mA
where new tubes should test 14mA
Same code "XS" September 1974
Tested in High End preamps. Great for audio.
price is for the quad (4 tubes)
sorry no individual boxes this time
I always send the tubes by priority registered mail with tracking number within hours after receiving payment