E84L 7320 is special long life version of EL84 6BQ5 7189 Philips Output Pentode (SQ Special Quality Version)
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This is three slots, two plate ribbs version. Perfectly matched pair, for SE amplifier. In EL84 boxes, not NOS, but tested strong exactly like NOS 100%. These ones were made in Siemens Munich plant, vertically printed codes in two rows, U03 ≠8F Siemens code!
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