THE CARTHAGINIANS IN SICILY. 350-325 BC. Silver Tetradrachma, 26mm. O: Female head, l., possibly Persephone.. R: Horse's head, l.; palm tree behind.
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Tetradrachma - An ancient Greek silver coin weighing about 13 to 17 grams, roughly the same size as a U.S. quarter but three times thicker.
Thumbing - The rubbing of skin oil onto a coin in an attempt to hide contact marks.
territorial gold coins pieces of various shapes, denominations and intrinsic worth privately struck in the general area of recently discovered gold deposits for the needs of local commerce tetradrachma An ancient Greek silver coin weighing ...
The two coins shown above are both tetradrachma of Alexander I (Balas) of the Seleukid Kingdom. While there are minor differences due to die wear and striking characteristics, there is no question that they share a common obverse die.
Talent = c. 26.17kg
60 Mine = 1 Talent
1 Mine = 436.224g
100 drachmae = 1 Mine
6000 drachmae = 1 Talent
1 drachm = 4.36g
1 tetradrachm = 4 drachmae = 17.45g
25 tetradrachmae = 1 Mine
1500 tetradrachmae = 1 Talent ...
Although the value of these tetradrachmas can be reckoned as being equivalent in value to the denarius, their precious metal content was always much lower.
 See also: Tetradrachm, Silver, Drachma, Coinage, Ancient
  
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