Portuguese Silver 480 Reis "Joao IV Countermark" 1643

Portugal 480 Reis (Joao IV Countermark) 480 coin obverse
Portugal 480 Reis (Joao IV Countermark)  coin reverse

Obverse
Counterstamp "Crowned 480" over "8 Reales"(Pataca) from Spain or America
Lettering: 480

Reverse
Arms

Extended information
Year
Denomination
Currency
Metal
Ruler
Weight
27 g.
Diameter
40 mm.
Shape
Round
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Year
Mintage
Prices per year/grade
Prices per year/grade
ND (1643) 
Mintage-
Value
-