Tested with a calibrated TV-7D/U tube tester.
Calibration by Daniel Nelson.
Date code: matching codes KW 188-5Construction: round getters gray plate
Tested at: 98 100 98
Average new 88
Minimum good 53
The minimum is equal to 65% of the life of the tube
Tested for shorts and gas.
30-day free return. Your items will be packed very well and shipped promptly.
We combine shipping on tubes.
Always glad to answer any questions.
Thanks for looking!