Amperex
12AX7/ECC83
17 mm Long Plate
D-Getter with Foil Strip
Made in Holland
in 1958
in Original Box

Label is partially erased from handling
Box has a taped flap

Labeled as "Mullard Made in Gt Britain"
However, Foil D-Getter and Delta date code indicates this tube is made by Amperex in Holland

Rare and Legendary D-Getter with Foil Strip 17 mm Long Plate Version

Date Code: mc6 Delta 8K
Made in November 1958 in Heerlen Holland

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

Measurement: 
1590/1530
where minimum good value is 875

Very Strong tube!
Verey tightly balanced triodes!
Possibly unused!

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.