I found a very strange postcard in an old book that I purchased. The postcard appears to be advertising material for a hardware store but I'm not really sure. The card is addressed to: A.M. Holter Co., Helena, Mont. requesting: Please send me 1 Keg 50, 1 Keg 60 Common nails. Postmark May 25, 1913 Avon, Mont.
This is the postcard (front and verso):