Silver drachm, 16mm, 3.56gm, issued 377-353 BC
Obv: Three quarter facing head of Apollo.
Rev: MAVΣΣΩΛΛO, Zeus standing right holding double headed axe, wreath to left.
References: Sear 4956, SNG Cop 592.
Mausolus was the satrap of Caria under the Persian empire. When he died, his magnificent tomb (where we get the name Mausoleum) was declared one of the Seven Wonders of the Ancient world.