USA Silver Trade Mark "Colorado Century of Progress" 1933

Obverse
Mining scene.
Lettering: CENTURY OF PROGRESS 1888 ∙ WORLDS ∙ FAIR ∙ 1933 USE SILVER TO PROSPERITY

Reverse
Colorado State seal.
Lettering: ONE ∙ OUNCE ∙ OF ∙ PURE ∙ SILVER COLORADO NIL SINE NUMINE TRADE MARK