The Die Varieties of the Nesbitt Series of United States Envelopes

The Die Varieties of the Nesbitt Series of United States Envelopes, written by Victor Maximilian Berthold and published in 1906, is a comprehensive philatelic guide that details the various die varieties of the Nesbitt series of envelopes issued in the mid-19th century. Berthold addresses the complexities of identifying these envelopes, highlighting their historical significance and the variations in their designs. This work serves as both a catalog and a resource for collectors, aiming to clarify the classification of these collectibles and enhance the understanding of early American stamped envelopes.