Front: AM 10029 LOADING COPPER ON STEAMER, HOUGHTON, MICH. COPR. DETROIT PUBLISHING CO. Back: "PHOSTINT" CARD. TRADE MARK REG. U. S. PAT. OFF. MADE ONLY BY DETROIT PUBLISHING CO. 50 AND CANADA. FOREIGN. TWO THIS SPACE MAY BE USED FOR MESSAGE. CENTS
