It's similar in weight, diameter, and writing style, but not a match, to this copper coin
https://www.zeno.ru/showphoto.php?photo=116868
India, Bahmani Sultans, Mahmud Shah, half gani, BH 136
Perhaps this can give a starting point, or it could be some totally different coin.
In Zeno I didn't find a gold Indian or Islamic coin near this weight and diameter, so it might be plated. Also gold coins are usually more ornate than this.
