MACEDON. Thessalonica. Octavian, with Divus Julius Caesar, circa 28-27 BC. (Bronze, 23 mm, 8.26 g, 11 h). ΘΕΟΣ Laureate head of Julius Caesar to right; c/m: monogram of NK within circular incuse. Rev. ΘΕΣΣΑΛΟΝΙΚΕΩΝ Bare head of Octavian to right; below, Δ. RPC I 1554. SNG ANS 824. For c/m: Howgego 625. Good fine.
The Greek letter Δ below Octaavian's neck is probably the date year 4 of the Actian Era, or 28/7 BC.