The Seleucid Kingdom, Antiochos I, 280 - 261 BC. Tetradrachm, Seleucia-on-the-Tigris, c. 274 - 270 BC. (Silver, 17.24g., 27.9mm). ... - A magnificent, fresh, beautiful coin struck in high relief with a wonderful portrait of a beleaguered king. Very probably the finest example of this type known. Good extremely fine.