NOS Svetlana 6550C

New old stock Svetlana 6550C's, 90's and 2000's vintage. Also known as winged =C='s these are the original St Petersburg tubes, not from the Reflektor/New Sensor factory. These have assorted labels as depicted and include rectangular and round hole plates. We have matched styles. All tubes are burned in and tested by Doug. We have limited quantities of mostly pairs and singles.