I bought this coin as an "unknown", with the idea of adding the griffin to the animals collection. The griffin and the quadripartite square with four pellets led me to Abdera in Thrace, and a close match in Wildwinds. The description of the coin in Wildwinds is, Abdera, Thrace, c. 411-385 BC. AE10mm, 0.95g. Griffin sitting left, right foreleg raised / EΠI ..BIO(K?) and thyrsos around lined square, with a dots in each section. May -; AMNG -; Moushmov 2441 var (magistrate). The coin was from a London Ancient Coins Ltd auction on deamoneta.com, from Jun, 2012, auction 95, lot 72.
A closer match was found on ACSearch, from a London Ancient Coins Ltd auction of 2013. The description of this coin is, Thrace, Abdera, c. 411-385 BC. (10mm, 0.95g, 9h). Griffin seated l., r. foreleg raised. R/ E?I (?)BIO and thyrsos around four-part raised square. May -. Unpublished in the standard references.

On the top of the square on the reverse of my coin there is a clear BlO with what looks to be an O or a P in front of it, which matches up with the (?)BIO on the 2013 London ancients coin. Both descriptions identify the object to the right of the square as a thyrsos, but the object on my coin looks more like a blob than anything else! Can anyone help in properly identifying and attributing this coin? Thanks.

Abdera, Thrace, c. 411-385 BC. ?
Obverse: Griffin seated left with right foreleg raised. Reverse: E?I (?)BIO and "blob" around a quartered square with pellet in each quarter. Bronze? Diameter: 11 mm. Weight: 1.2 gr.