Nabis, Tyrant of Sparta, AR tetradrachm, 207-192 BC. 30 mm, 16.94 g. 

Helmeted head of Athena right, wearing Corinthian helmet decorated with a coiled serpent.
NABIOS downwards to right of Herakles, naked, sitting left on a rock which is covered with a lionskin, resting on upright club before him. 
L over star in upper left field, A over star in upper right field, thunderbolt in lower right field.

Berlin p. 213 in ZfN 1898