Valvo branded by Philips EF83 perfectly matched pair (2 tubes). NOS never used tube are new, never used, test very strong tube 1 – Ia = 4,8mA (120%) tube 2 – Ia = 5,0mA (125%) where 100% for the new tube is 4 mA Mesh Plates VALVO HAMBURG code: D1D4 is presented at the both tubes made at Valvo Hamburg factory in 1971 You will get the tubes you can see at the pictures I always send the tubes by priority registered mail with tracking number within hours after receiving payment. Normal 0 false false false EN-US X-NONE X-NONE Santic – Ain’t Gonna Hurt Nobody