I have a Matched pair of NOS New In Box Amperex 7308/E188CC with gold pins and made in Heerlen, Holland.
They have same etched date code of Delta 4D3 (made in 3rd week of April, 1974).I have 2 pairs of these NOS new in box tubes available. Test extremely strong on my precision calibrated Hickok 539C tester as NOS tubes should. 13500/13800 & 14500/13700 (spec for new: 12500 & minimum good: 7000). Tested on my phono preamplifier with no issues whatsoever. Very very quiet with no microphonics: Phono Grade.
Suitable for all applications including phono section, line or driver. USPS Priority Mail Shipping with Tracking within US will be $7. Payment by check or money order (no Paypal please).
Local pickup with cash is always welcome. I have over 900 100% positive feedback score on Audiogon with the same member ID - "sojs", so buy with confidence.
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