Lang, M. and M. Crosby (1964). The Athenian Agora X: Weights, Measures and Tokens. Princeton, New Jersey, The American School of Classical Studies at Athens. (https://zenon.dainst.org/Record/000211771)
C C C: Mould half for 5 circular tokens of 18mm, all of the same design: Apollo standing left holding branch and leaning on tripod, C C C around. There is a central casting channel and branches coming off it and nail holes in the upper right and lower left corners
Reference
Cesano, L. (1904). Matrici e tessere di piombo. Bullettino della commissione archeologica comunale di Roma 33: 146-153