Reproduction of a poster stamp from a series of 5 issued by the Sioux City Chamber in the 1910s and given to area businesses to use on their correspondence to promote Iowa and Sioux City. "Iowa's Summer Playground - Okoboji Lakes - Swimming - Fishing - Dancing - Golf." Set includes an 11x17 print and a set of 8 note cards, blank inside. (You save $3.00 when you buy the set.)