Prt-904.
AR rupia, 1818, KM-—, Gom-21.01, portrait with short hair, extremely rare type, Album (2012), sale 13, lot 1428

D. João VI (1816-1826) Rupia 600 Reis 1818 Goa AR A: GOA RUPIA / 1818 R: shield G: 32.01
Photo from SIXBID

JOÃO VI, 1816-1826. Rupie 1818, Goa, für Portugiesisch Indien. Büste r. Rv. Wappen auf gekrönter Erdkugel. Gomes India Port. 21.01
Photo from SIXBID

Wt = 10.86g. Date 1818 over 1817?
Photo from Steve Album, sale 49, lot 2376