Real Maravedis?

[Pericles J]

So guys, I've been trying to identify this coin for a long, would u mind helping me?

IV Maravedis?

Thanks in advance.

[Zaph0dd]

Not a lot to go on.

Spanish Empire
A 6 (VI) maravedis countermark on a earlier issue,

There are two different types, one without a mintmark done in 1636 and a later one, which I think this one is
 if it has a mint letter under the VI, these were stamped in 1641/1642

(the reverse should have a date countermark, but as usual its not very evident)

Here is a similar one from my collection

[Zaph0dd]

Looking at it again when im not half asleep.

I think it has a G for Grenada mintmark

[Pericles J]

Oh god, now that u say it's true there is a letter bellow the VI, but I can't say if it's a C or G