The "oldgolay" didn't say where he is from, but around these parts , Detroit / Dearborn tools show up fairly frequently with the Ford script. The pix is of a combination square blade with the Ford script. The imprint does not appear to have been stamped (blade is hard) but rather etched or perhaps stamped before heat treat. I looked thru the Ford trade School "Shop Theory" book , all the illustrations of the tools shown all show the manufacturers logo, if any logo shows at all.
Joe B