3¢ Portrait of Whistler’s Mother – Mother’s Day – 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. Although the Mothers of America stamp was printed by both the flat plate and the rotary press methods, only the flat plate stamp was re-issued. Any difference in shade is incidental.
The Farley printing was issued without gum 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.