Matching Pair 1963 GE JAN 5687 Audio Tubes. Black Plates.

Tested Strong @ 100/110 and 103/105 with a minimum of 55/55. 

Tested on a recently calibrated B&K 747 Dyna Jet Tester.

1940, 40s, 1950, 50s, 1960, 60s, 1970, 70s. Tube(s) shown in pictures will be the exact tube(s) you will receive.