1948-50 American Aristocrat
Looks like an '48-'52 Aristocrat.
You're correct, I was assuming it had no date code. If it does, then it's a '51 or '52 -- http://wiki.badgerandblade.com/US_Gillette_Dating_Information
It doesn't seem to have a code. The only thing it says, apart from logos etc, is "Pat Nos on Package" with package spelled out in full, on the inside.
By the way is the gold plating supposed to be real gold, or is it something that looks like gold?
It could also be a Diplomat.
Thank you for your advice. I cleaned it when I bought it ages ago. It seems in good nick, yes. A bit of the gold's faded away unfortunately. I never use it though, I am still working on my technique with a Merkur 34C Heavy Duty Classic.