1821, Brazil, John VI. Large SIlver 960 Reis Coin. Mint Mark: Rio de Janeiro ® Reference: KM-326.1, Gomes, 25.18. Denomination: 960 Reis Material: Silver (.903) .7746 oz ASW. Weight: 27.22gm Diameter: 41mm Obverse: Crown above, value (960) , date (1821) and mintmark (R), all inside wreath. Legend: JOANNES . VI . D . G . PORTBRAS . ET . ALG . REX . Reverse: Globe with parallels and ...