Jim,

Sounds like it is no longer unique. Great find. I'm about to go out to my local antique swap meet, hope I find a RARE one too! (Sorry Archie). Good luck to all in finding chips and a Happy Fathers' Day to all the Dads.

Scott

P.S.
Take a look at a truly "VERY RARE CHIP" that I have posted on ebay.
http://cgi.ebay.com/aw-cgi/eBayISAPI.dll?ViewItem&item=355795495