50 Kobo Nigeria coin discover

Today, I was checking my grandma boxes to see if I will see something important, when I was checking I discover old 1991 50 Kobo coin on her box.

This very coin is small with a diameter of 24.5mm and it has a 12 sided polygon. It is make of nickel material. Inside it, we has the Nigeria coat of arms and also federal republic of Nigeria written with the year 1991 which he was minted engraved. Looking at the other side of the coin you can see that maize cobs and the value of the coin (50 Kobo)

I really love this coin because it was very valuable but now it is not useful here because of the value but people are being it because of what the use in the production of it.

Has a Nigerian have you used this coin and what can you say about it?
Thanks guys for your time

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