Poster currently offered by Lewis Wayne Gallery for $1999.95 (US).
This unusual promotional poster is very similar to another--the 1938 Jingle Club promo banner--only this is printed without type or the Jingle Book graphics. It's likely that this was an overprint designed to be used for whatever franchise items were being promoted. It is marked on the reverse (in pencil) 1938 S. W. Blank Franchise Campaign and is lithographed onto linen.
Image and info: Lewis Wayne Gallery. Used with Permission.