11x14" single-sided cardboard sign has superb color art of Spark Plug sweating and pulling large wagon being driven by Barney Google w/cartoon characters inside and running alongside. Characters shown include Felix the Cat, Der Captain, Hans, Maggie, Toonerville Trolley Skipper, Boob McNutt, Sappo from Thimble Theater, Abie the Agent, Joe Jinks, Mac from Tillie The Toiler, others. Printed by Buck Printing Co. of Boston, MA for the Boston Sunday Advertiser as noted by imprint at bottom. c. late 1920s. Scattered margin wear w/1" crease at upper left corner. VF. Only the second example we've seen in our 48 years. Rare.