Graeme, welcome aboard on your first post. I googled both of the names and there was a shotgun forum post of another person seeking information of a Nama shotgun that appeared to be a knock-off of a Greener. There were observations that the gun was most likely made by Miroku. TK Firearms as you may have discovered has references to California and Anchorage Alaska. It is a nice looking gun with a very desirable weight. It resembles a Webley action. Hopefully someone more knowledgeable than me will pipe in.
