The EFO Collector
Auction
Club Business
Honor Roll
Membership
Buyers & Sellers of EFO Material
Books
Errors,Freaks and Oddities on U. S. Stamps - Questions Marks in Philately, by Dr. Stanley B. SegalPerhaps the first book focusing on EFOs, Dr. Segal's work helped bring EFOs into the mainstream of philately. We present here a complete reproduction of the book.
Papers, Articles
Errors, Freaks and Oddities, by John HotchnerIn this authoritative essay, Hotchner provides a classification of all EFOs, reviews how they occur and how much they might be worth. This article was originally published in 2000 in the Millenium Edition of Linn's World Stamp Almanac, 6th edition.
The AG Files, by Ed Silver
A series of EFO articles published between 1977 and 1983.
Articles by Wayne Youngblood
Articles by John Ryskamp on computer-vended postage.
Other EFO-Related Articles
- Joe Kirker: The U.S. 1918 Jenny Issues: Some Beautiful Ugly (?) Ducklings!
- John Ryskamp: Note on Luce scratches.
- Andrew Irvine: Remembering Dad
Exhibits
Exhibit on U.S. postal card errors by William Weiss.Exhibit on forgeries by John M. Hotchner, Joann Lenz and Richard Drews.
Exhibit on U.S. bicolor postage issues of 1869, 1873 & 1901 by Don David Price.
THE JENNY - Production Variations of America's First Airmail Stamp by Don David Price.
WebSites
Interesting EFO Related Sites (Non-Commercial)Interesting EFO Related Sites (Commercial)
Other Interesting Philatelic Sites
