Thusly Paul Dormer Spake Unto All:

" emitted :

Stax?

AKG, Sony, Grado, Beyer Dynamic, Etymotic, Shure, Koss, Amphony, Anne
Summers.

Sennheisers are *everywhere* and at least Sony and Koss should be
possible to find, but the others will likely be difficult to find
here.

From searching this group I find a lot of talk about Sony MDR 7506,
and from other sources also Sony MDR-CD580. I'll see if I can get hold
of one of those and test. And I'll keep an eye out for Stax.