Posted By:
will watson"For years collectors thought that the Leaf gum company's "Knockout" set consisted of 49 cards, erratically numbered. Indeed, uncut sheets of the cards could be found that were exactly 7 cards by 7 cards. Then, about 8 years ago, a Rocky Graziano Leaf emerged and since then one other has been found. The Graziano card may not have been released except by accident or may have been recalled. The last Graziano Leaf sold at auction for over $1,000. One owner of the card says he got his in a trade with a neighborhood friend in New York City in 1949 so they must have been available."
source: http://www.boxingcollectors.com/allcat.html
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