This special sheet containing six stamps of the 3-cent Mount Rainier design of the National Parks series was authorized on behalf of the annual convention of the American Philatelic Society at Atlantic City, NJ. The sheet is printed without perforations, but with the usual gunning. Sheets were printed on the stamp press operated at the convention exhibition by the Bureau of Engraving and Printing. The marginal inscription reads: "PRINTED BY THE TREASURY DEPARTMENT, BUREAU OF ENGRAVING AND PRINTING--UNDER AUTHORITY OF JAMES A. FARLEY, POSTMASTER GENERAL--IN COMPLIMENT TO THE AMERICAN PHILATELIC SOCIETY FOR ITS CONVENTION AND EXHIBITION--ATLANTIC CITY, NEW JERSEY, AUGUST 1934."