What I am wondering about this razor is the lack of any markings except for the serial number. I've seen ABC razors that lack Gillette logos and MADE IN U.S.A. markings, but they all have the ornate handles. The case has no Gillette markings (inside or out), but the blade holder has the Gillette logo. Is this common for razors of the era? I'm just trying to figure out exactly what I have.