Condition: NOS/NIB - Telefunken ECC802S very rare and hard to find in this condition. This is the premium version of the Telefunken ECC82/12AU7 specially designed for low noise, low microphonics and >10.000 hours service. Genuine Telefunken, with diamond logo at bottom. Matched pair with same production code in original Blue/Red Telefunken box and Amplitrex Test Certificate.