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<p>[QUOTE=&quot;clayirving, post: 2810689, member: 18867&quot;]<b>Friedberg (FR) Number</b></p><p><br /></p><p>The Friedberg numbering system was developed by Robert Friedberg, and it is the numbering system used in Paper Money of the United States by Arthur L. and Ira S. Friedberg. It is considered the standard, universally accepted method of describing and cataloging United States paper money.</p><p><br /></p><p>These catalog numbers are used as a shorthand method of systematically identifying a particular note based on its design, series and signature combination. Each Friedberg number represents a unique combination of these factors.</p><p><br /></p><p><br /></p><p><b>Krause-Lemke (KL) Number</b></p><p><br /></p><p>The Krause-Lemke numbering system was developed by Chester L. Krause and Robert F. Lemke. Chester Krause formed Krause Publications in 1952. Twenty years later, an 800-page Standard Catalog of World Coins made it&#039;s debut and the rest...is history. In the nearly 35 years since that massive catalog rolled off the press, list of Krause Publications has grown from just one title to more than 750 titles in print.[/QUOTE]</p><p><br /></p>

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