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A single stamp is all that is needed to
distinguish the Farley Special Printing of this stamp, if it is
imperforate it is the Special Printing. Any difference in
shade is incidental.
* The 2¢ Grand Canyon National Park Special Printing, Scott
757, was issued without gum. Some of these sheets were gummed in 1940 when provision was made to
add gum to the
Farley sheets if the owner wished it. According to Sloane
the sheets were to be returned to the Post Office Department
who would pass the sheets on to the Bureau for gumming. Only
the National Parks sheets, Scott's 756-765, and the National
Park Souvenir sheets, Scott's 769 and 770 were to have gum
added.
This Farley sheet was issued as a sheet of 200 stamps,
printed by the flat plate method, with
four panes of 50 separated by guide lines. In the very
center of the sheet the horizontal and vertical guide lines
crossed, creating collectible pairs with guide line between,
as well as a center-line block. The margins of the sheets
had arrows at the end of the guide lines, creating
collectible arrow blocks.
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