Interesting EFO Related Sites (Non-Commercial)
Joann Lenz's website on modern postal historyFascinating website created by Joann Lenz focusing things "she finds interesting," including articles on modern postal history, the Mount Rushmore issue on "Lenz" paper, her exhibit on E-Com, articles on the National One Cent Letter Postage Association, postal counterfeits and much more. (Green denotes EFO related material).
New Zealand Stamp Errors
Great site with many pictures of New Zealand stamp errors, maintained by Bruce Sergent.
Canadian Tagging Errors
This is an excellent online catalogue of all known Canadian Tagging Errors, maintained by Del Peters. It is based on a legendary collection on the subject, first assembled by Ken Rose (who also wrote "Canadian Tagged Errors", a reference still used on the subject), then sold to "G. D. Mass" and then to Del Peters.
In addition to the listing of errors, this site contains a lot of information that will be helpful to the EFO collector, such as information on tag types and terminology. It is part of a site on Canadian philately, which is very interesting in and by itself.
www.aerogramme.com
Maintained by EFOCC Member Jerry Kasper, this site is not only an excellent aerogramme site, but it also describes many aerogramme errors.
www.re-entries.com
Maintained by EFOCC Member Ralph E. Trimble, this site is contains extensive information about and listings of re-entry varieties. Wondering what a re-entry is? Go to the site and find out. Incidentally, this site has some of the best stamp pictures and close-ups.
Wikipedia Pages of Interest
Page on Specimens
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