Monongahela Inclined Plane in Pittsburgh

Front:
680 THE POINT AND GOLDEN TRIANGLE WHERE THE ALLEGHENY AND MONONGAHELA FORM THE OHIO MO MONONGAHELA INCLINE PITTSBURGH, PA. LIBERTY BRIDGE AND ENTRANCE TO TUNNELS 7A-H882

Back:
MONONGAHELA INCLINED PLANE CO. Operating since 1870. Length, 640 feet. Altitude, 370 feet. 38 degree rise. MINSKY BROS. & Co., PUBLISHING DIVISION, PITTSBURGH, PA. "C.T.ART-COLORTONE'REG.U.S. PAT. OFF.