Fotografia d'epoca con didascalia coeva dattiloscritta al verso:
"Mining plays an important role during Colorado's centennial celebration in 1976. Spread across the rugged face of Colorado's high country are hundreds of weathered mines, mills, and ghost towns which bring the fabulous gold rush days of a century ago sharply into focus"
(timbro al verso)
Vera fotografia d'epoca, originale ed autentica