Marched pair of 6S5S (6C5C) tubes, tested and measured with the precise RoeTest V10 tube tester. These tubes are general purpose triodes which were designed for service as oscillator, detector or amplifier. It is direct replacement for the 6C5 (metal envelope tube – so this one has another shape), 6C5GT tube and the chinese 6C5P as well. New in box tubes (boxes may wear some longer stotage marks) and will be delivered with measured parameters attached (please look at the gallery pictures). Manufacturer: Reflektor, Saratov. Year of production: 1959