Watch List notes:

United Kingdom of Portugal, Brazil and the Algarves, João VI AR 960 Reis. Rio de Janeiro, 1821-R. Overstruck on a 8 Reales of Ferdinand VII (1809 LM-JP). JOANNES•V•I•D•G•PORT•BRAS•ET•ALG•REX•, crown above denomination, date and mintmark with wreath / SUBQ SIGN NATA STAB, Portuguese coat-of-arms on globe. KM 326.1; LDMB-P479; Gomes-25.20. Under-type: KM106.1; Cal-473. 26.75g, 40mm, 12h.

Good Very Fine. Much of the undertype visible.