Indeed it is, LS! Thanks. It's back in the Metal Rescue bath now, but I took it out long enough to see if the marking was any more legible, and it was, partially. Everything to the right of DISS and ELEC is still marred by box rot, but I was guessing DISSTON. I didn't know they ever sold screwdrivers, though. Did they make them or are they third party? Anyway, since this is something you have several of, consider it yours. It is an 8". Maybe you can restore it. Slight crack in the handle, one rivet or pin in the ferrule is missing and the other is shorn off inside. I'll bring it over the river whenever I make the pilgrimage for the barristers and the Great Duro/Indestro Ell Handle Swap.
I'm glad I grabbed it!