Clear Creek Colorado mining certificate View cart “EMPIRE CITY UNION MINING DISTRICT COLORADO TERRITORY Spring Patch Claim certificate 1862” has been added to your cart. Showing the single result Sort by popularity Sort by latest Sort by price: low to high Sort by price: high to low Add to cartEMPIRE CITY UNION MINING DISTRICT COLORADO TERRITORY Spring Patch Claim certificate 1862 $750.00