These vintage 1982 NOS (new old stock) Beijing 6E2 magic eye tubes are carefully tested in a circuit at a plate voltage of approximately 250 VDC. All tubes pass both visual and circuit checks. All tubes have a manufacturing date of 1982. These 6E2 tubes are a direct replacement for other 6E2 tubes used in VU circuits and can generally be used as a substitute for EM87 and 6HU6 bar-type magic eye tubes. The tubes are carefully packed for shipping.