See Martini, Sicilia nos. 63-88. -- R. Calciati (Annotazioni Numismatiche 10, 1993, p. 205) has argued that the forgery is genuine and dates to the period of Atratinus. He has also published specimens with the countermarks N and NE, and implausibly suggested that 654 consists of two different denominations. -- Specimens in RBW coll. (6.27, 7.46) also suggest ears of corn rather than a patera.