GE JG-6100 6C4WA vacuum tube tested at new old stock 
Tested with a calibrated TV-7D/U tube tester.
Calibration by Daniel Nelson.
Tested at: 112
Average new: 90
Minimum good: 55 
The minimum is equal to 65% of the life of the tube.
Tested for shorts and gas.
Date code: 59-48 59-17 188-5 
Construction: triple mica angled square getter gray plate
Glass: clear
Base: 7 pin
30-day free return.
We combine shipping $1.00 for each extra tube purchase.
Your items will be packed very well and shipped promptly.
Always glad to answer any questions.
Thanks for looking!