Catalogue of the postage stamps and stamped envelopes of the United States and possessions, issued prior to January 1, 1919

This catalogue of United States postage stamps, stamped envelopes, specimen stamps, and proofs is published with the view of acquainting philatelists with what the Museum desires the Government collection of United States stamps to represent when completed.

The catalogue is designed to be of educational service to all philatelists in forming a comprehensive collection of United States stamps; it notes all the important varieties and shades, but is not intended as a philatelic primer as no description of the designs of the stamps is given.