The reverse of this denarius may refer to the deification of Julius Caesar or Ludi Apollinares which took place from July 6 to 13 each year.
Coin in slab GCN graded AU58.
Roman Republic
P. Clodius M.f. Turrinus (42 BC), Denarius 42 BC, mint Rome
Obverse: laureate head of Apollo right, lyre to left
Reverse: equestrian statue prancing right on arcade of five arches, PHILIPPVS above, AQVA MAR (MAR ligate) within arches
Diameter 20 mm