You could probably ask this on the main board. After all '48 Leaf is close to Pre-war.
In any case, click on the link in the tool bar at the top of the page that says: "Detecting Card Alterations and Reprints." (It's second from the right side.) Then scroll down to :"Judging the Authenticity of Early (Pre-1930) Baseball Cards" (printable version).
This should give you a decent start.
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Jim Van Brunt
Last edited by Jim VB; 08-01-2010 at 12:51 PM.
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