Posted By:
Fred YI'm sure these cards are from the modern era, but maybe not! I have never seen these before, and they appear to be made out of a thin, balsa wood type material.
http://forums.ebay.com/db2/thread.jspa?threadID=1000429726&start=0>
Judging by the Koufax card in the box, they obviously were issued after 1966.