Condition: NOS/NIB - Valvo E283CC made by Siemens. The Siemens E283CC is a special quality double triode. Designed for a very long lifetime >10.000 hrs strong build with triple mica – for low microphonics. O-getter, very extended shielding for low hum and frame grid makes this tube sound as the famous ECC803S made by Telefunken. Remark: different pin layout then ECC83/ECC803S.