Smyrna.
Tetradrachm, magistrate Poseidonios circa 160-150, AR 16.59 g. Turreted head of Tyche r. Rev. ΣΜΥΡ / ΝΑΙΩΝ / monogram; all within wreath. Milne, NC 1914, p. 274, 2. SNG von Aulock 1098.
Lovely iridescent tone and about extremely fine

Ex Leu sale 18, 1977, 196. From a Distinguished Swiss Collection.