Unusual Ancient Greek: helmeted bust, winged owl on frond

Size is ~16mm, (haven't weighed it yet, but about 3g…

Can't find on numista so I may have to add it if need be, just curious what this coin is…

Has a top lined letter K, and a top lined letter M in retrograde.

N#403138 

OK,  thanks much Giobruno for that,  that is certainly the coin I have just in more worn condition. I was just slightly heavy and larger than the Numista example.

These ancient coins never have identical measurements between each other as in modern coins. They can vary a lot.

That's why I use intervals on the size and weight search fields.