Racer and engineer (1880–1943) who cofounded the famed motorcycle manufacturer Harley-Davidson. Scarce and desirable TLS signed “Wm. S. Harley,” one page, 8.25 x 10.5, Harley-Davidson letterhead, September 5, 1935. Harley writes to Gene Walters at a Harley-Davidson franchise in Orlando. In full: “This is in reply to your letter of August 29. I had a discussion concerning the straight pipe with a butterfly with our Sales Dept. and they objected to our building this type of pipe because of the noise angle. However, when we get a little more time in our Experimental Dept. I am going to build one of these jobs and try it out….” Intersecting mailing folds (vertical fold to one letter of last name) and light staining to top margin, otherwise fine condition. R&R COA.