Genuine West German made ECC808 tubes.
ECC808 is a special low distortion, low noise, high gain audio triode made by Telefunken, it has electrical characteristics similar to ECC83 or 12AX7 but does not pin out like ECC83 so using in an ECC83 circuit is certainly possible but socket wiring would be different.
Price is per tube. Limited quantities available of this item, please contact us for availability. This item is shipped from Britain, in North America or Asia please allow 2 to 3 weeks for delivery.
For details see spec sheet: http://tubezone.net/pdf/ecc808.pdf