EFOCC Resources

EFOS for Sale

APS Affiliate #103

ATA Chapter #94

EFO Bibliography

Needless to say, every issue of The EFO Collector, the publication of the EFO Collectors' Club, is an excellent reference on EFOs. For membership, click here.

J. M. Baxter: Printing Stamps and Engraving
164 pages, published in 1939 and out-of-print, this book remains a main resource for the EFO Collector. It explains the engraving process in great detail, and since many U.S. stamps were printed by engraving, it sheds light on what can go wrong during the production of engraved stamps.

Stephen R. Datz: 2005 Catalogue of Errors on U.S. Postage Stamps, 13^th Edition
This is the standard reference for U.S EFOs. Printed in color, it provides information on EFOs, including rarity and price information. 208 pages. You might be able to purchase it from stamp supply dealers, as it was not available through its publisher's website as of August 2009..

Joseph Monteiro:Canadian Postage Stamp Errors of The Queen Elizabeth II Era - Volume 1
Click here for more information on purchasing this book.
Joseph Monteiro:Canadian Postage Stamp Errors of The Queen Elizabeth II Era - Volume 2
Click here for more information on purchasing this book.
Joseph Monteiro:Canadian Postage Stamp Errors of The Queen Elizabeth II Era - Volume 3
Click here for more information on purchasing this book.

Volume I describes Canadian postage printing errors from 1953 through 2009. It first provides a general background to understanding printing errors. Part I examines each of the printing errors that fall into the categories invert, missing inscription, missing colour, etc. Part II examines each of the perforating errors that fall into the categories double print errors, print shift errors, etc. Part III examines other printing errors. Part IV provides a bibliography on these errors.

Volume II describes Canadian postage perforating errors from 1953 through 2009. It first provides a general background to understanding perforating errors. Part I examines full imperforate errors. Part II examines part imperforate errors. Part III examines full and part imperforate errors. Part IV provides a bibliography on these errors.

Volume III describes Canadian postage misperforated errors from 1953 through 2009. It first provides a general background to understanding misperforated errors. Part I examines each of the well-known misperforated errors. Part II examines each of the well-known double and triple misperforated errors. Part III examines other perforating errors (i.e., misaligned perforating errors, blind perforations, missing perforation, little/large/double/elongated and overlapping perforation and freak strikes of the perforator). Part IV provides a bibliography on these errors.

Joseph Monteiro:Printing and Perforating Errors of Pastage Stamps in Canada (1953-2009): An Analysis
Click here for more information on purchasing this book.

The book provides an analytical methodology to understanding and evaluating printing and perforating errors. It classifies errors by type and provides the necessary knowledge to enable the reader to analyze how errors can occur and what is impossible. For example, if a stamp was engraved, then forgeries that use photo or lithography can be easily identified. If a stamp is printed in sheets of four panes of 50 stamps, then we know that a sheet with an error on each stamp must produce a minimum of 200 stamps. If a T-comb perforator is used, one knows what type of part perforating error is likely to arise. Its approach is similar to Abstract Algebra. It attempts to provide an educational and analytical approach to philately so as to place it on a sound foundation.

Tom Pierron: 2005 Catalogue of Great Britain Stamp Errors & Varieties
This 500-page catalog, profusely illustrated in color, focuses on the Queen Elizabeth II issues. See www.errors.info for further information, including how to order from Bacchic Multimedia.

Dr. Stanley B. Segal: Errors, Freaks and Oddities on U. S. Stamps - Question Marks in Philately
Published in 1979 by the Bureau Issues Association (now United States Stamp Society), this is one of the earliest authoritative works focused on EFOs. It is profusely illustrated. 100 pages. To read or download the book, click here.

Canadian Philatelic E.F.O.'s, 3^rd Edition
This 226-page catalog on Canadian errors can be ordered from www.rousseaucollections.com.

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