I have 4 NOS New In Box Mullard (Made in Blackburn, England) ECC88/12AT7 tubes for sale. All of them are labeled and packaged by Philips, but these are actually made in Blackburn, England by Mullard."These glorious tubes have an attractive sweet warmth in their midrange and lower regions. The top end is silky and pleasant, without being rolled-off." Date codes etched on tubes are Bxxx. "B" code indicates they are made in Blackburn, England. Test extremely strong on my precision calibrated Hickok 539C tester. Matched pairs $50. Single tube $30. Money order of check only (no Paypal please). USPS First Class Mail Shipping with Tracking within US will be $5.
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