EARLY AIRPLANE MANUFACTURER SUPPLIER AND RELATED AVIATION LETTERHEADS Great grouping of twenty letterheads most illustrated all ca. 1915-20. Most were sent to Henry Woodhouse in his capacity as President of the Aero Club of America. Content varies but generally all concern aviation including displays at shows product promotion etc. Most are signed by secretaries with the better exceptions noted. Included is: L. Phillip Billard Corbin's Exhibition Co. Gallaudet Co. Bristol Aeroplane Co. Service Aviation Training & Transport Co. Kemp Machine Works Rolls Royce (U.S.) Ltd. Southern Aircraft Co. (2) Grand Rapids Gas Engine Chicago Aero Works Aircraft Engineering Corp. Canadian Aeroplanes Ltd. Aeromarine Plane & Motor Co. Sterling Engine Co. Panhandle Aerial Service Chicago Aero Works The Gyro Motor Co. (signed by Edgar Berliner) Nebraska Aircraft Corp. and Pomilio Brothers Corp. (signed by Ernesto Pomilio). Generally very good.