Mullard / ECC83 MULLARD ECC83 - 12AX7 This listing is for 1 double triode preamp tube. It is more or less used but has been tested good. The internal construction is EXTREMELY rare, featuring an early type with a square getter and long plates. This tube was made in 1954 and has the etched code H4 1600 visible on the back. This is ONE OF THE EARLIEST EVER ECC83 TYPE! Shipping via registered airmail with tracking number. Import fees for U.S. buyers are included in the shipping cost under the new tariff regulations. Other methods available upon request. Internal Reference (SKU): 97_1cf63
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