1893 Worlds Fair Station/Chicago. Machine cancel (Bomar C93-12A) on Postal entires (two on Columbian entires) additionally franked with Columbian adhesive, each with pre-printed publicity for Columbus Day, Chicago Day or Manhattan Day showing Columbian Half Dollar Commemorative Coin, these covers were prepared and serviced by "J.A. Pierce", Extremely Fine, a lovely trio. Estimate  $300 - 400. $0 (Image)