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| APS Affiliate #103 |
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| ATA Chapter #94 |
American Philatelist: Issue of August 2010, page 728
Keywords: stamp errors, stamp errors, EFO, Youngblood, Herman Herst, Jacob Hoffman, National Union Postage Stamp Corporation, New York City, photostamps, stamp mount, lithography, Eugene Costales, 1935, 1936
John M. Hotchner
Errors, Freaks & Oddities
The EFO Collector
The Archives
John M. Hotchner
EFO Corner
The Columns
from Linn's
from Linn's
Articles By
Wayne Youngblood
AG
Files
Ryskamp
on
Computer-Vended Postage
Not
quite
EFOs