30c Columbian (239).
S.e. at top, rich color on bright paper, perfect strike of "World's Fair Sta., Chicago Ill., Nov. 28 10:30AM 93"
duplex datestamp, Very Fine, scarce with the exposition duplex marking which is perfectly positioned to show all dates in the cancelling device, dated after the fair was closed, this cancel is known used up to Dec. 27, 1893, Scott Catalogue assigns a $1,350.00 premium for this cancel on cover versus a normal cover
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