16¢ The Great Seal of the United States – Air Mail Special Delivery – Issued without Gum
On sale at the Philatelic Agency in Washington, D.C. from March 15 through June 15, 1935.
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 16¢ Air Mail Special Delivery Special Printing was issued without gum and 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.