coin of Punic-Sardinia, 241 BC (revolt of Sardinia from Carthage)

Obv. head of Isis
Rev. three corn ears

Müller Supplement 291   6.79 g   Numismatica Ars Classica AG, Auction 13 (1998) no. 555

(Source Jenkins-Lewis, 1963, Cathaginian Gold and Electrum Coins, p 51)
The revolt of Sardinia from Carthage coincided with that of the Lybians.
Another revolt was in 216 BC from Rome (in 238 BC the Romans took over Sardinia).