Coins of Roman Egypt
Greek DatesBibliographyDenominationsRegnal Years


Billon Tetradrachm
Antoninus Pius
Billon Tetradrachm
First and Second Centuries
Roughly equivalent to a denarius when introduced by Tiberius, the silver content declined rapidly. The tetradrachm was the only denomination to be issued continuously until Diocletian's currency reform in 246.
Average size: 23-26 mm   
Average weight: 10-14 gm    

Potin Tetradrachm


Potin Tetradrachm
Mid Third Century

While the silver content was decreased to 10% or less, these remain attractive coins of good fabric through the reign of Gallienus. Size and quality then begin to decline.

Average size: 19-25 mm    
Average weight: 8-14 gm    
3rd Century Potin Tetradrachm
Potin Tetradrachm
Mid Fourth Century
By the reign of Diocletian the silver content is less than 1% and the size is much reduced. Both metal and manufacture are crude by comparison to earlier issues.  
Average size: 17-21 mm  
Average weight: 5-12 gm  
Æ Drachm 
Introduced under Nero, the drachm was issued with regularity through the reign of Marcus Aurelius. Production then becomes sporadic and by the reign of Severus Alexander drachms are rare and likely commemorative pieces. The final issue of drachm is a rare and much reduced issue by Aurelian with Vabalathus.  
Average size: 30-36 mm  
Average weight: 12-28 gm  
Æ Hemidrachm  

Begun by Nero and continuing through the reign of Elagabalus, the hemidrachm is the least common of the bronze coins.

Average size: 28-30 mm  
Average weight: 10-15 gm  
Æ Diobol
One of the earliest denominations, the diobol was introduced by Augustus and continued to be struck until the reign of Elagabalus.
Average size: 22-26 mm  
Average weight: 5-11 gm  
Æ Obol
Introduced at the same time as its larger counterpart, the obol only lasted through the reign of Antoninus Pius.
Average size: 18-20 mm  
Average weight: 3-6 gm  

Æ Hemiobol

Also introduced by Augustus, the hemiobol was issued in small quantities, ceasing under Marcus Aurelius. These are the crudest of Alexandrian bronzes, the flans are often irregular and the strikes off-center.
Average size: 12-15 mm
Average weight: 1-2 gm
Æ Quarter Obol
Both Milne and Curtis catalogue all of the smallest bronze issues as dichalka. It appears however, that the smallest of these coins represent a separate denomination.
Average size: 8-12 mm  
Average weight: 1-1.5 gm  


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