97 was a good year for these cards
It's estimated as few as half a dozen copies have survived. Until Lifson came up with five more, that is. Lifson said that a non-collector in Georgia found the cards 10 years ago when going through some of his late grandfather's papers. He didn't realize their value until recently.
http://www.sfgate.com:80/cgi-bin/exa...PORTS14253.dtl