Lock No. 4 On Monongahela River

Front:
C-814 Lock No. 4 on between Charleroi and Monessen, Pa. Monongahela River BA-H921

Back:
MINSKY BROS. & co., PUBLISHING DIVISION, PITTSBURGH, PA. ON THE MONONGAHELA RIVER BEAUTY SCENES IN PENNSYLVANIA "C.T.ART-COLORTONE' REG.U.S. PAT. OFF.