
So I read this bit of Polybius (below) and landed right back at this coin (above):
For Hiero and Gelo not only gave seventy-five silver talents, partly at once and the rest very shortly afterwards, to supply oil in the gymnasium, but dedicated silver cauldrons with their bases and a certain number of water-pitchers, and in addition to this granted ten talents for sacrifices and ten more to qualify new men for citizenship, so as to bring the whole gift up to a hundred talents. They also relieved Rhodian ships trading to their ports from the payment of customs, and presented the city with fifty catapults three cubits long. And finally, after bestowing so many gifts, they erected, just as if they were still under an obligation, in the Deigma or Mart at Rhodes a group representing the People of Rhodes being crowned by the People of Syracuse. (5.88.5-8)
The context is c.226BC and Rhodes’ use of its recent earthquake to solicit diplomatically expedient gifts. [Link to some relevant scholarship]
A) It’s good context for the above coin on the personification of political bodies in honorific art forms in 3rd Century BC.
B) It might suggest that the coin type imitates a statue group or potential statue group or the known style of a type of statue group. This isn’t crazy lots of coin types derive from statues of one sort or another.
C) It made me think about who crowns whom in Hellenistic art in what context. Under the Empire cities shake hands rather than crown one another. Nike crowns everybody. She’s kind of a whore that way. It’s kind of her M.O. Ditto Eros (Cupid). Then this came to mind:

The crowning obviously honors and emphasizes the status of the crowned, but what about the crowner? Does it diminish the status of Syracuse to bestow the crown? Or in fact is it a statement of inherent superiority if one can crown another? We need only think of Napolean’s anxiety about being crowned by the Pope and thus his decision to crown himself and his queen.
On a more serious note, Walbank as always is full of goodness:

IG xi.2 199 b 1.23 (Delos, 273 BC) is available at PHI Greek Inscriptions:

As is [Demosthenes] 18.91 “On The Crown”:
it be resolved by the People of Byzantium and Perinthus to grant to the Athenians rights of intermarriage, citizenship, tenure of land and houses, the seat of honor at the games, access to the Council and the people immediately after the sacrifices, and immunity from all public services for those who wish to settle in our city; also to erect three statues, sixteen cubits in height, in the Bosporeum, representing the People of Athens being crowned by the Peoples of Byzantium and Perinthus; also to send deputations to the Panhellenic gatherings, the Isthmian, Nemean, Olympian, and Pythian games, and there to proclaim the crown wherewith the Athenian People has been crowned by us, that the Greeks may know the merits of the Athenians and the gratitude of the Byzantines and the Perinthians.
Update 1/5/2016: My thoughts on this are maturing. I think there must have been a very typical statue group that was developed for such a representation and the Nero/Agrippina is a late example of the general type. This informs how I am thinking about types like RRC 419/2 and other crowning scenes on coins. Cf. Also the Corinth Crowning Ptolemy group attested by Athenaeus drawing on Kallixeinos and discussed by Pollitt (here and here).
Update 5/1/14: This isn’t precisely related to the rest of this post, but I wanted to be able to find this passage again when thinking about the Locrian coin (Pliny, NH 34.32):

This demonstrates Romans receiving honors from S. Italian Cities for their role as protector a decade before Locri’s coin. I also like the sentence about this being a means of establishing foreign clients. I doubt the Thurians saw it that way!
1/20/16: Constantine and the Tyche of Constantinople