Watch List notes:

Anonymous. 6th-4th centuries BC. Æ Aes Formatum (26.5mm, 22.54 g). Mint in Etruria(?). Cockle-shell cast bronze / Blank. Cf. ICC Appendix p. 76, pl. 90, no. 5 for similar type. Dark brown and green patina with earthen highlights/deposits, casting flaws. As made. Interesting.

From the Judy Day Frink Collection. Ex Goodman Collection (Classical Numismatic Group 43, 24 September 1997), lot 1205.