Watch List notes:

SATRAPS OF CARIA. Hidrieus, circa 351/0-344/3 BC. Trihemiobol (Silver, 9.5 mm, 0.97 g, 3 h), Halikarnassos. Laureate head of Apollo facing, turned slightly to the right, and with his chlamys fastened at neck. Rev. Ι - Δ - Ρ - Ι between the rays and petals of a star-like floral . BMC 7. HNO 238 (temp), 2 (this coin). Karl 29. SNG Kayhan 885. SNG von Aulock 2371 (this coin). A lovely, toned example. About extremely fine.
From the "Collection sans Pareille" of Ancient Greek Fractions, and from the collections of L. Mildenberg and H. S. von Aulock.