The portrait on the obverse of this Greek coin does not look strange to me , at all. Still I think I need to be careful while identifying an ancient coin. I believe this coin is likely to be a bronze Macedonian. What do you think ? Thanks for your comments..
There are a couple of coins similar to yours here. http://wildwinds.com/coins/greece/seleucia/alexander_I/t.html It is difficult to see the detail on the reverse of your coin.