Mullard
12AU7/ECC82
17 mm Long Plate 
Dual Post (Goalpost) O-Getter
Made in 1958 in England.

Very Rare 17mm Long Plate Dual Post O-Getter Version.
Made very early in 1958.

Date Code: k61 B8B
Made in February 1958 in Blackburn England.

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

Measurement: 
2880/2940
where minimum good value is 1950

Very strong!
Tightly balanced triodes!

Tested in my preamplifier to make sure working as intended with no issues at all.

I will gladly combine shipping upon request.

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The tube(s) in this sale include a 30-day satisfaction guarantee.
I strive to ensure that every buyer has a completely satisfactory purchasing 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.