ECH42=6CU7 International Germany NOS made by La Radiotechnique France early 1960's (3 in stock)
ECH42=6CU7 Telefunken Germany <> bottom NOS 1966 (1 in stock)
ECH42=6CU7 Valvo Germany NOS made by La Radiotechnique France early 1960's (2 in stock)
