Watch List notes:

PORTUGUESE MALACCA, Joao III (1521-1557), tin dinheiro, issued after 1521, Lisbon for Malacca mint, obv. arms of St. George, inscription around 'IOA III POR ET AL', rev. the armillary sphere, (Saran Singh J.3.07). Good very fine and scarce.

Slabbed by NGC as Repatinated.
Ex Dr V.J.A.Flynn Collection.