Isopsephia Denominations on Greek Coins
Pi = 80

Bronze Coin: Ptolemaic Egypt, Cleopatra VII, 51-30 BC. 80 Br Drachmae, 22.3 gm.
Obverse: Diademed & draped bust facing right.
Reverse: Eagle standing facing left, cornucopiae in left field, the letter "Pi" (80) in the right field.

Mu = 40

Bronze Coin: Ptolemaic Egypt, Cleopatra VII, 51-30 BC. 40 Br Drachmae, 8.43 gm.
Obverse: Diademed & draped bust facing right.
Reverse: Eagle standing facing left, cornucopiae in left field, letter "Mu" (40) in right field.
480 bronze drachmae = 1 silver drachma