EL84 Tungsram labeled EI Nis

Without boxes, but tubes are perfect NOS! I’ve seen these tubes under a lot of various logos like Siemens, Philips . . . I suppose that these tubes are from beggining of 80s, ring getter, stapled plates in three spots, two holes the on plates.
The silver marks on the walls of the bottle are not sign of used tubes. These marks are magnesium fall-outs originated during manufacturing process which Tungsram used and they are characheristic for Tungsram!!!

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