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The Chronology of Second Century Ptolemaic Bronze Coins:
Two Different Methods to Graphically Interpret Weight/Size Data

An analysis of weight/size data shows that there are serious flaws in a recently presented chronology for 2nd century bronze coinage


The graphing of the data from F&L's Table of Hoards occurs when the consecutive average weights from the listing are placed in each of seven horizontal positions from left to right (seven sub-series labelled 6a, 6b, 6c, 6d, 6e, 7a, and 7b). The verticle positions of the coins in the graph are based on factual data (the weights from 2g to 40g); the horizontal positions (6a to 7b) are hypothetical.

It is the order of the weights in F&L's Table of Hoards listing that creates F&L Table 2. Although the Zeus-Ammon / double-eagle hypothesis was applied in the listing, it was not mentioned how the "proper" sequence in the list was obtained from hoards.

F&L state that the types must have been critical for recognizing the various denominations and The following table [F&L Table 2] takes account of obverse types only.

F&L Table 2. Proposed subdivisions of Series 6
WEIGHT 6a 6b 6c 6d 6e 7a 7b


LH-Ammon Sv1423

Ammon Sv1423 







Isis   Sv1491

Isis Sv1233

Ammon Sv1424A









Ammon Sv1375

Ammon Herakleion

Ammon Sv1380

Ammon Sv1383


Heracles Sv1497,1492




Isis Sv1234




Alexandria Sv1493






Isis Sv1384




Heracles Sv1494

Heracles Sv1376



Heracles Sv1385




Alexandria Sv1495


Alexandria Sv1236




Isis   Sv1154

Ammon Sv1173

Ammon Necropolis

Ammon Sv1377


Alexandria Sv1381

Alexandria Sv1386


Heracles Sv1496

Helmented bust Sv1155


Nilus? Sv1378

Isis Sv1238

Isis Sv1232

Isis Sv1287





Helmented bust Sv1379

Helmented head Sv1156






Athena Sv1195





The Ammon coins at the top of each column in F&L Table 2 show weight reductions for the Zeus-Ammon / double-eagle type, i.e., there are reductions from 6b to 6c and then to 6d. Within the various columns from left to right there are similar reductions in weight for each of the types Isis, Heracles, Alexandria, and Helmeted bust.
    These weight differences are interpreted by F&L as piecemeal weight reductions of coins with the same obverse type representing the same denomination during various progressive periods from c.204 to 116 BC.

However, F&L Table 2 can, and should, be interpreted in a very different way (click below).


 CLICK HERE   to see that F&L Table 2 does not fit the hypothesis of obverse marking nor reduced weights for the same denomination