United States. 1949, 17 December. HISTORY OF AVIATION AVIATION AIR ENGINEERING DEPARTMENT SELF-MANAGEMENT PLANE WITH DOUBLE WING AEROPLANE BIPLANE WITH ENGINE POLISH BROTHERS RATE RETURN AEROPLANE BROTHERS RATE IN SMITSONIC INSTITUTE Issue of a postage stamp dedicated to the return of the first aircraft with the Wright brothers design to the Smithsonian Institution - Institute. The story of the postage stamp depicts the Wright brothers and the plane with a double wing (biplane) with a screw engine. In the picture of the envelope - the Wright brothers' plane in flight. The whole thing is one envelope of the first day (CPD) of the stamp issue in the postal circulation with the FULL issue of the 1st postage stamp Mi.604. Condition - LUX. This past post office efficiency is an excellent example not only for the collection, but also as a documentary material for inclusion in the exhibition of philatelic exhibition of any level, including international, because it is the last instance in the world of philately - a whole thing that really passed the post office, withstands the most stringent requirements of philatelic judging and provides immediately the maximum score of the sample. This efficiency is available in three versions of the artistic performance of the picture on the envelope - see also scans 2 and 3 with clean, not past the post office efficiency. please indicate the desired version of the picture on the envelope.