Engineer and designer who founded the automotive company that bears his name. TLS, one page, 8.5 x 11, Glenn L. Martin Company letterhead, January 20, 1931. Letter to Walter Clayton, chief engineer of the Pitcairn Aircraft Company. In full, 'We are sending you our assembly blueprint 333 showing the location of the up draft carburetor and the brackets we propose to put on the intake manifold extension to support the carburetor to prevent breakage.' In fine condition, with light mailing folds. COA John Reznikoff/University Archives and RRAuction COA.
