Yeah, that is what I thought too........own assembly. But I thought Northern California bay area. AFAIK, they are original designs, case and dial etc.This could be wrong, but I seem to recall they did their own assembly, I think in Montana (?), but most likely using either catalog parts or parts they had produced overseas. Their cases don't seem to be too ubiquitous.
I've seen a few close up, and they've always struck me as pretty well executed tool watches for the money.