I had trouble with working out the framework for the horn. I essentially guessed what I could imagine it to be and tried to at least copy the dimensions of the original. This is the result.
1 month, 3 weeks
SCADS: Seleucid Coins Addenda System
Silver tetradrachm, draped Apollo on omphalos type
Obv: Diademed head of young king r.
Rev.: ΒΑΣΙΛΕΩΣ on r., ΑΝΤΙΟΧΟΥ on l., Apollo, … 37 more words