Siemens
12AX7/ECC83
Long Plate
Single Post
O-Getter
Made in Germany

Label is mostly erased.

Very rare early long plate made in 1958 with mC3 code.
Early made single post version.

Date Code:  mC3 ≠8D
Made in April 1958 in Germany

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

Measurement: 
980/1110
where minimum good value is 875

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 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.