Lock No. 1, Monongahela River

Front:
Lock No. 1, Monongahela River, Pittsburgh, Pa. M

Back:
PITTS PUBLISHED BY I. ROBBINS & SON, PITTSBURGH, PA. MADE IN U. S. A PA PITTSBURGH PROMOTES PROGRESS. <P ALS 4: Randson A-45835 AND CANADA. TWO CENTS.