Though a bit torn, the paper is still in fairly good condition. The mining claim by Idora Silver Mines of Coeur d'Alene, Idaho was signed in 1991, with a Peter Laczay, Agent, named as the contact person.
An internet search led me to a web site (http://www.dvminerals.com/stocks/USA49.html) stating that Idora Silver Mines was "incorporated under the laws of the State of Idaho in 1889" and that, "In 1998, the company purchased Nurses Station of America, changed its name to American Health Providers Corporation, and undertook divestiture of its remaining mining assets."