Need ID/infor on Ancient coin

This is what I know:
1. It's Greek
2. It's old
3. It's silver
4. Diameter: approx 15mm
Any additional information is greatly appreciated. Thanks.
1. It's Greek
2. It's old
3. It's silver
4. Diameter: approx 15mm
Any additional information is greatly appreciated. Thanks.

DPOTD-3
'Emancipate yourselves from mental slavery'
CU #3245 B.N.A. #428
Don
0
Comments
I have no clue! TTT
My wantlist & references
Obv: Head of the nymph Histiaia
Rev: Histiaia seated on the stern of a Greek galley, holding a naval standard
Histiaia was the city's local goddess.
Your obverse closely matches this one, which recently sold at auction for $65 this past December.
However, your reverse more closely matches this version, which sold at the same auction for $55.
Here's another variety of the same.
edited to include this very similar one
DPOTD-3
'Emancipate yourselves from mental slavery'
CU #3245 B.N.A. #428
Don