Methymna, Lesbos, AR obol, ca 500-460 BC. 8 mm, 0.55 g.

Helmeted head of Athena right.
Tortoise within dotted square, all within incuse square. 

Klein 793; Traité II 2255; Hoover HGC (Islands) 891; Imhoof Miszellen II, 65; Warren 1225 ("Lycia")

With permission of Gitbud & Naumann Auction 33, Lot 178, July 2015.