The National Postal Museum Library is one of the largest and most important research facilities for the study of philately and the history of postal services in the world. Supplementing the collection of publications on philately and postal history are major document collections including:
- General files of the Third Assistant Postmaster General – contain documentation on the stamp design and production process, covering issues such as paper, inks, engraving and printing methods, production numbers, and public reaction to the stamp designs.
Stamp design files of the Third Assistant Postmaster General – especially strong from 1920 to 1970, the files are arranged by Scott number and type, including regular issue, commemorative, and airmail stamps.
Please take a look at the finding aids – http://www.sil.si.edu/digitalcollections/NPM/
and let us know your reaction in the comment box below.