The price is for One! Total of 5 are Available. One is different than the other 4 – Made in a different year but the same type of tube. That is the first from left to right. Vintage NOS (Never Used New Old Stock) Mullard CV4004/12AX7/ECC83 Military Box Plates. Made in England at Mitcham. And 1966 or 1956. Check the codes in the pictures. This is the British military designation for a ruggedized, long-life version of the standard 12AX7 / ECC83 dual triode tube. These are highly prized for their robust construction, superior audio quality and low noise. Factory, often characterized by a. These are considered super premium and one of the best ever. Tested in a Guitar Amp and they all sound phenomenal! I don’t have tube tester, but They all are Never Used New Old Stock.