Description: Pittsburgh, PA, Origin of The Ohio River Item Specifics: Postcard. Postcard Type: Divided Back Postcard (ca. 1907-1915) Card Dated: PM 1907 Postmarked at: Not Legible View Location: Pittsburgh, Pennsylvania View Subject: The picture is of The joining of the Allegheny and Mononggahela Rivers to form the Ohio River Publisher: Pittsburgh News Company. Series/Number: -- Size: Standard Condition: Good Special Attributes: -- We do accept electronic payments thru PayPal only.