The list of 'C' refiners/mints/hallmarks:

• C & C Mint
• C & S Incorporated (to do)
• California Crown Mint
• CAL-AG (to do)
• Capital Metals
• Cascade Refining
• Casper (to do)
• Certified Mint (to do)
• Chovanak
• Classic Coins (Chattanooga)
• Cincinnati
• Circle City (to do)
• Citizens Capital Corp
• Cloverleaf (to do)
• CMI same as Constitution? (to do)
• CMP (to do)
• Cochise Precious Metals
• Coin Shack
• Columbus Precious Metals
• Colonial (to do)
• Congress Mine
• Consolidated Mines
• Constitution (to do)
• CR
• CRC
• Cripple Creek Colorado (to do)
• Crown Metals
• CSRCO (Academy)