First is a silver drachm from the city state of Chalkis on the Island of Euboia. hera obverse / Eagle eating snake reverse (BMC50) dating from 340 -294 BC. A very 3d obverse has made this nigh on impossible to scan successfully



The next two are tetraobols from Histiaia, Euboia. A very popular `type' coin with collectors the design of which spanned two centuries from 300 -146 BC. They typically have the head of Hystiaia on the obverse as well as her sitting on the prow of a ship, reverse. The green stuff on the second one has since been `curated' away.

The first is a larger type (BMC 85) the second is much smaller (BMC 133,99)