Very rare emission with serpent to the left.
This type in 2022 during the Electronic Auction 516, Classical Numismatic Group, lot 229, was sold for 650 USD.
Greece
Mysia, Atarnios, AE 4-3rd century BC
Obverse: Laureate, three-quarter facing head of Zeus, slightly right
Reverse: ΘΕ monogram within coiled serpent to left
Diameter 11 mm, weight 1.41 g
