Ephesus 29/20 BCE
TYPE: Octavian laureate
LEGEND: IMP(erator) CAESAR DIVI F(ilius) COS VI LIBERTATIS P(opuli) R(omani) VINDEX
Begin reading the legend from the lower left (about 7 on the clock)
IMP(erator) = commander
CAESAR DIVI F you know by now
COS VI refers to Octavian's 6th consulship (28 BCE); when consulships or other offices or honors are listed in the legend, it provides an absolute means of dating the coin. In many other cases, coins must be dated relatively, that is, relative to the hoards in which they are found.
LIBERTATIS P(opuli) R(omani) VINDEX = defender/protector of the liberty of the Roman people