4 piezas x 5C4S 5Ц4С ~ 5U4S ~ 5Z4 ~ CV1863 TUBOS RECTIFICADORES NUEVOS DE COLECCIÓN KOBRA URSR
Be careful! Soviet tubes are only approximate analogs of Western tubes and match pinout, but are not exact copies of Western tubes. The volt-ampere characteristics of Soviet tubes are different from their Western analogs!