U.S.P.O Paid, 1c Gold on Black Glazed, 7LB11, Tied by Numeral "2" in Double Circle, Drop Rate Cancel, on 1851 Folded Letter

Included in the The Philadelphia Carrier Sausage Adhesives 7LB11 to 7LB13 Census By Larry Lyons
Folded letter dated April 22, 1851, addressed to Gustavius Remat at 183 N. 6th St. The stamp with a pre-usage horizontal crease which breaks the paper.
This is the Only Example recorded in the census to be tied by the drop rate marking.