Please, could somebody help me to define the coin! The coin looks like AR Tetradrachm of Sicily, Entella 320-300BC. The weight is 6,7g; d=25,2mm. A material seems to be bronze. But the coin is too thin for the bronze coin (its thickness is about 1-2mm). A style (quality) of an image is not like on bronze coins. You can't see an original surface of the coin on the photo. The original surface is fully covered with a thin layer of solidified soil's sediments.
Here's a silver siculo punic tetradrachma from Entella Sicily , I think your ""coin"" is based on one of those. probably a copper token made in the 20th Century and lost somewhere outside.
Welcome OKW! Most punic tetradrachms weigh around 16+ grams. I think Andres is correct, that this is an imitation made from bronze. Where did you get it? Do you have any other ancients? John