Unfortunately I don't have any floorboards in the house to measure but I'm sure somebody does. (floorboard multiplied by 2.5 just in case you get confused)

There is also a pic that looks like it might be saying  16 x 3.000 ?

Why don't you take another pic Dan and include a tape measure? If you dont have one use a stubbie of beer.

I shall await a second opinion from somebody using the floorboard calculation method.

Hey Dan, thanks for trying to find a home for this unloved 16 inch rim. You can get brand spanking new ones with shiny chrome reasonably cheaply however there might be someone in your neighborhood who wants one suitable for painting but do not hope to get a Kings Ransom for it....unless those stampings on it mean something special. Cheers