Could it be ΜΟΡΙΑΣΕΩΝ? There is a coin like this, but 12 mm and 7,2 g, in Katalog Münzauktion Essen 64 (1992) no. 47, acquired by P. R.
Franke. He attributes it to an until now unknown thraco-macedonian tribe, the Moriaseis, which coul be mentioned in Plin.
nat. 4,41 as Moriseni. He dates it to the time of Philip V and
Perseus.
His article about the coin: P. R.
Franke, ΜΟΡΙΑΣΕΙΣ. Die erste Münze eines bislang unbekannten thrakisch-makedonischen Stammes, in: V. Spinoi - L. Munteanu, Miscellanea numismatica antiquitatis in honorem septagenarii magistri Virgilii Mihailescu, Bucarest 2008, p. 67f.
Frank