The product is a pair of NOS (1945) (New Old Stock) Sylvania 12SL7GT VT-289 vacuum tubes, made in the United States during World War II. These tubes are military surplus and were used in various electronic equipment, such as radar systems. They have been tested and are guaranteed to be in working condition. These vintage tubes are ideal for collectors or enthusiasts of vintage audio and video equipment, particularly those interested in restoring or replicating Heathkit vacuum tube audio amplifiers. The tubes come in original boxes with military markings, adding to their historical and nostalgic value.

Note: Tested on recently calibrated and capped Heathkit TT-1 Tube Tester measuring 1325/1425 & 1500/1550 microhomos with a minimum r/p of 1040 microhomos. Boxes showing signs of age due to long term storage. Thank you.