This Colt National Match was shipped to Simon Atlas in Washington D.C. on July 2nd, 1936. The letter shows the date of Manufacture was June 11th, 1936 and was shipped in a single gun shipment. The letter mentions Factory Engraved: "M.J. Schaub" on the receiver.
It's unclear the history of this pistol or any of the parties involved but due to the limited number of National Match pistols produced, very few left the factory having any engraving done.