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As can be seen in the images above, it
would be impossible to
distinguish the Farley Special Printing from the regularly issued
commemorative simply by comparing a single stamp, unless the
stamp has a guide-line. The key to identifying
this Farley Special Printing is the guide-line between adjacent stamps, in
this case a pair with a vertical guide-line between. The difference in
shade is incidental.
The 3¢ Byrd Antarctic Expedition II Special Printing, Scott 753, was issued without gum and no
provision was made to add gum to either sheets of this stamp or
to Scott 752, both of which are the only Farley Special
Printing sheets that were perforated.
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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