Facsimile Announcement and Contract for Wright Military Aeroplane - 1908

One page "Signal Corps Specification No. 486, Advertisement and Specification for a Heavier -Than-Air Flying Machine" dated Dec 23, 1907 and stamped Jan 20, 1908. 8.5x14.5" on heavy woven paper, oily stain lower left.  Accompanying is the 5-page, printed one side only, facsimile contract as signed by Orville Wright.  Historic documents in their original state.