Tetradrachmon

Of the above coins, the drachma, didrachmon, tetradrachmon or ſtater and the pentadrachmon were of ſilver, the reſt for the moſt part of braſs.

Source: wiktionary

In enlarging the tetradrachmon, however, the Athenians degraded the Solonian standard of the drachma, although it had been confirmed at the time of the reforms which accompanied or followed the Archonship of Eucleides, b. c. 403. On examining the table of weights in the Hunter Collection, in which there are more than 100 tetradrachma, we may observe, that all the old tetradrachma weigh more than 260 grains, or more than 65 grains to the drachma on an average, and that all the broad or later tetradrachma are below 260.

Source: wiktionary

Sure enough, it was full of shiny didrachmons, tetradrachmons, and even some massy dekadrachmons.

Source: wiktionary

At right, a third-century B.C. silver tetradrachmon depicts Alexander the Great.

Source: wiktionary