Ioseph 20 real

Hello,
I have a ioseph 20 real coin.
It weight 23.7 gr.
How do i know if it is genuine?

Many thanks, Uri.
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https://en.numista.com/catalogue/pieces17981.html
Some doubts?

Well, if the weight of my coin is 23.7 gr it is sure to be a fake?

Even without looking at that link above, for comparison, it certainly
looks fake, to me. A 211 year old coin would have some wear, also the details look
too sharp, plus the colour does not look like the silver it is supposed to be.
Will see what other members think though.

Hi,

Many thanks!

Thanks - also the border disappears in parts, which should not happen.
I made these ...

One of them is mine and the other is genuine?

Amazing!

Thanks. Yes - the whiter colour coin is from that earlier link -
the more grey coin is yours. I made that animation using PhotoScape.

Well done!!!

My man inrest is in ancient coins from my area. I bought today 3 silver European coins. 2 of them are probebly fake, i yet did not identified the third.

Have a great weekend and thanks again!

Uri.