Entering and Leaving Poe Dock

Front:
11878 ENTERING AND LEAVING POE LOCK, SAULT STE. MARIE, MICH. COPR. DETROIT PUBLISHING CO.

Back:
"PHOSTINT" TRADE MARK REG US. PAT OFF MADE ONLY BY DETROIT PUBLISHING CO. THIS SPACE MAY BE USED FOR MESSAGE. FOREIGN, TWO CENTS