It is rectangular and pretty faded on both the obverse and reverse.
It is pretty small, I don't have a scale handy but I'd say around 3-4 grams and maybe 12mm by like 22m or so, don't have a ruler nearby either haha
Here are the pictures of the coin.

Any information would really help! I doubt it has a page here on Numista but any links or books that you could send or recommend would really be great, thanks!