1818-R, Brazil, John VI. Beautiful Silver 320 Reis Coin. Mint Year: 1818 Reference: KM-324.2. Denomination: 320 Reis Mint Mark: “R” (for Rio de Janeiro)Diameter: 31mm Material: Silver Weight: 8.95gm Obverse: Crown above value (320), mint date (1818) and mint initial ®, flanked by pellets. All within wreath. Legend: JOANNES . VI . D.G . PORT . BRAS . ET . ALG . REX . Reverse: Por ...