It is roughly the size of an English 5p, bronze (originally) weathered to green in places. The only writing i can make out is on one side what appears to be SOLI and on the other ACAI - it is very poor and I don't expect anyone to guess from this bit of info. I was wondering if anyone had any links that they could direct me to. I was told, in Polish, that it is of a Saint (Augustine, if i remember correctly) and that it is 'old'.

Thanks for any help!

A picture will be very nice if you can provide it

No can do at the moment, but it seriously wouldn't show much. The coin has a clear stamp mark, i can see the bulge of the molten metal by the edge, perhaps this allows it to be dated slightly more easily.