(1888 Centennial Exposition of the Ohio Valley and Central States, Cincinnati). Cinci., O. Exposition Sta. Numeral "5" Duplex cancel (Bomar C88-01) tying 2¢ green Bank Note on 1888 illustrated Expo. advertising cover with corner card of "Ohio Honorary Commissioners/Park Building", reverse with spectacular all over design of the Expo. showing the Expo. Main Building, included is matching illustrated letterhead with the committee inviting addressee to use their apartments on the Expo. grounds, reduced at right affecting design on reverse, F.-V.F., a stunning cover and an unrecorded postmark. Estimate  $300 - 400. $0 (Image)

(1888 Centennial Exposition of the Ohio Valley and Central States, Cincinnati) Cinci., O. Exposition Sta. Rec'd. Bold cds (Bomar C88-02) on 1¢ Postal card used locally with "Cincinnati, O." duplex cancel, addressed to 1st Floor Park Building, Exposition, City, Extremely Fine, a wonderful example of this rare marking, only 6 examples recorded. Estimate  $400 - 600. $0 (Image)

(1888 Centennial Exposition of the Ohio Valley and Central States, Cincinnati) Ohio Centennial, Columbus. Spectacular all over illustrated design showing a "Frontier" motif in printed in blue on reverse of 2¢ Postal entire with Columbus postmark, entire with printed corner card of the "Centennial Exposition Board of Directors", Extremely Fine. Estimate  $100 - 150. $0 (Image)