It has a few blemishes, but it’s sharp. No chance of reading a maker's mark.
Its definitely wider than any slick I've seen. It doesn't look sturdy enough to be a slick from this picture. The socket on my 3 1/2" wide slick is more robust. Maybe for removing old roofing/shingles.
Yeah, I already tried that, to no avail.maybe it is time to hit some old Greenlee catalogs and see what else it might be.