View source for 1678 - Mesembria (Alexander the Great) (tetradrachm Heracles/Zeus) over Alexander the Great (London, BM, 1898-6-2-7)

{{Overstrike
|Image overstriking coin=DB_Overstrikes_784.png
|Image reference overstriking coin=Museum website
|Image overstruck variety=Alexander the great tetradrachm.jpg
|Museum collection=London, British Museum, 1898,0602.7 (https://www.britishmuseum.org/collection/object/C_1898-0602-7)
|Obverse description=Head of Herakles right, wearing lion skin headdress.
|Reverse legend=BAΣΙΛΕΩΣ AΛΕΞANΔΡΟΥ
|Reverse legend language=Greek
|Reverse description=Zeus enthroned left, holding eagle and scepter. Under the throne, AΛ. In left field, Corinthian crested helmet.
|Mint=Mesembria
|Ancient region=Thrace
|Authority=Alexander III the Great (Argead king, 336-323 BC)
|Date from=150 BCE
|Date to=110 BCE
|Period=Hellenistic
|Metal=Silver
|Weight=16.68
|Axis=11
|Denomination=tetradrachm
|Standard=Attic
|Coin reference=MacDonald 2009, p. 212, n° 3 ; Karayotov 1994, p. 88, n° 167 (O33-R65, monogram 25)
|Coin series reference=Price 1991, n° 1029
|Coin series web reference=http://numismatics.org/pella/id/price.1029
|Overstruck authority=Alexander III the Great (Argead king, 336-323 BC)
|Overstruck date to=175 BCE
|Overstruck period=Hellenistic
|Overstruck denomination=tetradrachm
|Overstruck standard=Attic
|Frequency of overstrikes=rare and concentrated
|Level of confidence=sure
}}
Date: c. 250-175 BC (PELLA) ; c. 225-175 BC (Period II, Karayotov)