(1893 Chicago World's Fair) Registered/Oct. 24, 1893/World's Fair Station,/Chicago, Ill, bold magenta four line handstamp on 10¢ Columbian entire (U351) to New Haven Ct., indicia cancelled by "Chicago World's Fair St. Chicago" handstamp duplex; hit of toning, Very Fine and scarce. Bomar No. C94-04  Estimate $400 - 600. $0 (Image)