Porsche 356 & Saddle.  Part of the Sporting Life series. Page 30 Porsche Showroom Posters; design by Hanns Lohrer. Published in August, 1961. My assumption is that the poster was intended for a non English/German/French speaking country. Super, super rare without imprint; the only one I've ever seen. 33.5" x 46.5", LM  5.21