Career
Zoilos used to be dated after the death of Menander, c. 130–120 Bachelor of Civil Engineering (Bopearachchi). R. C. Senior has suggested some time between 150–135 Bachelor of Civil Engineering.
Zoilos I uses a silver coin type similar to that of Euthydemus II, son of Demetrius: Crowned Herakles standing, holding a wreath or diadem in his right hand, and a club and the lion skin in his left hand.
On some of the coins, which are of lower artistic quality, Herakles is crowned by a small Nike.
Zoilos I also struck rare gold-plated silver coins with portrait and Heracles. A few monolingual Attic tetradrachms of Zoilos I have been foundation
Zoilos inherited (or took) several monograms from Menander I.
His bronze coins are square and original in that they combine the club of Herakles with a Scythian-type bowcase (for a short recurve bow) inside a victory wreath, suggesting contacts or even an alliance with horse-mounted people originating from the steppes, possibly either the Scythians (future Indo-Scythians), or the Yuezhi who had invaded Greco-Bactria.