G'Day KirKs,The book that I used for this reference is the "Encyclopedia of plate variations on U.S. stamps",It starts from Scott's #246 and ends at Scott's #1734,For anything earlier I use "The U.S. postage stamps of the 19Th Century Vol I,II and III"these covers stamps from Scott's #1 to Scott's #293.
The author is or was trying to promote the study of stamps and said this book should be used as a study group reference tool so what better reason to post.
Harry
