Tube manufacturer ID?

Folks - I’m finally organizing and cataloging all of my tubes and came across a pair of ECC88’s that I inherited. They are not in the actual manufacturer’s box, so I’m wondering if someone could ID that company actually manufactured these. Thank you in advance! - Jim

Can’t identify the tube manufacturer per se, but that is the Luxman logo

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My first thought would be Matsushita. Superficially, it has some similarity to the few images of Matsushita 6DJ8 family tubes I’ve been able to find on-line. Makes sense that Luxman would consider procuring tubes from a Japanese source. But without lot date codes, nothing but speculation. Sorry.