Watch List notes:

SICILY. Katane. Circa 450-415/3 BC. Hemilitron (Silver, 10.5 mm, 0.37 g, 5 h). Bearded and partially bald head of Silenos to right. Rev. K-A (retrograde) Winged thunderbolt. Apparently unpublished. Seemingly unique, and with a superbly engraved head of Silenos. Some surface marks. Edge broken 4-6h by an elderly dealer on the viewing of Nomos 17, otherwise, nearly extremely fine.
From the Vineyard Collection, Nomos 17, 26 October 2018, 34, ex Numismatica Ars Classica 18, 29 March 2000, 79.