The well-organized pattern with cohesive columns of data-points in RP Graph 1 successfully shows the various series of related coins produced during periods involving four consecutive regencies. They are, from left to right the ‘helmeted head’ series with the Athena head coin of Ptolemy IV (c.205 BC); the so-called Isis series of Ptolemy V (204-180 BC); the Necropolis hoard coins of Ptolemy V (204-180 BC) and of Ptolemy VI (after 180 BC); the coins of Ptolemy VI (180-170 BC) with co-regent Cleopatra I (180-176 BC); and, finally on the right, three examples of coins with the two-eagle reverse type produced by Ptolemy VI (180-c.170) and continuing with co-regent Ptolemy VIII (before 164 BC).
RP Graph 1 shows average coin weights according to the relative chronology (from c.205 to c.164 BC) implicit in Svoronos numbers. RP Graph 1 does not ‘prove’ Svoronos’ assignments. It illustrates a chronological pattern where all the weight/size data are consistent with updated attributions and, in contrast to F&L Table 3, are also in agreement with all previously accepted attributions.