Rogers 5R4GYB rectifier vacuum tube new old stock 
Tested with a calibrated TV-7D/U tube tester.
Calibration by Daniel Nelson.

Tested at: 59/53

Minimum good: 40/40

The minimum is equal to 65% of the life of the tube.

Tested for shorts and gas.
Date code: -

NOS/Used: new 

Construction: black plate round getter

Glass: clear 

Base: tight

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!