ACHAIA, Achaian League. Patrai. Circa 175-168 BC. Tetrobol (Silver, 15 mm, 2.35 g, 8 h). Laureate head of Zeus to right. Rev. Monogram of the Achaian League; across field, Δ - Ι; below, trident to right; all within laurel wreath. Agrinion 278-89. BCD Peloponnesos 502. Benner 19. Clerk 4-5. Light reverse die-shift, otherwise, extremely fine.