E84L 7320 is special long life version of EL84 6BQ5 7189 Philips Output Pentode (SQ Special Quality Version)
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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