U52/CV575
(=5U4G)
Black Plate
Bottom Square Getter
Coke Bottle
Black Base
Rectifier Vacuum Tube.

Base is tight.

Highly desirable U52/CV575 rectifier tube.

Date Code: HK KB/Z
Made in October 1952 in M.O. Valve Co. in Hammersmith England.

Fully tested by calibrated Hickok 539C tube tester
with no shorts, leakage or gas. 

Measurement: 
92/100
where minimum good value is 54

Strong and with tightly balanced sections!

I will gladly combine shipping upon request.

__________

The tube(s) in this sale include a 30-day satisfaction guarantee.
I strive to ensure you have a completely satisfactory purchase experience.
If you are unhappy with your purchase for any reason,
you can return the item for a full refund.

Please contact me directly prior to opening a return or leaving feedback.
I will almost always reply at least within 24 hours 
to remedy the situation for you with direct communication.