It appears to be one of the big plated-aluminium "drink coasters". At least, that's what the box I found one of these in at the Honolulu airport in 1983 was labelled; I acquired three coasters the other two being an
Indian Head cent and a
Lincoln Memorial cent.
Quote:
I used some tarnex then thought better of it until I found out something
If it's plated aluminium like mine was, don't clean it. The plating will come off easily and the underlying aluminium will corrode readily in any kind of cleaning agent; it will end up looking even worse.
Don't say "infinitely" when you mean "very"; otherwise, you'll have no word left when you want to talk about something really infinite. - C. S. Lewis