Neandria, Troas. AR hemiobol 6 mm, 0.25 g. 400-310 BC. 

Corinthian helmet right.
N-E-A-N, amphora within dotted square. 

Not in standard reference works but several known.

With permission of Pecunem Gitbud & Naumann - Auction 18, Lot 175, June 2014.
Estimate: 50 EUR.

cf also Hauck & Aufhäuser 14, lot 76; Gorny & Mosch 160, 
lot 1462; SNG v. Aulock -; Mionnet -; Klein -; Isegrim -.