Unknown Roman Coin In Very Nice Quality

Might be Decentius, Arles mint...maybe. (I'm not entirely sure) Like:

http://coinproject.com/coin_detail.php?coin=4746

http://www.coinproject.com/siteimages/04_047.jpg

This is a relatively rare coin of Decentius, caesar under Magnentius who usurped Gaul from Rome.

The entire period is big screwup - The empire had been split amongst Constantines progeny (initially into 5 between Delmatius, Constans, Hannibalianus, Constantine II and Constantius II). When Constantine died, Constans, Constantine II and Constantius II purged the imperial family to make sure no one could claim the purple against them - Hannibalianus was killed at this point and his lands split amongst the remaining sons (and it seems likely that Delmatius was also killed in this purge, but its not quite certain).

Then, due to some lengthy bickering, Constans had Constantine II killed annd assumed his parts of the empire (he now controls the West and half of Africa).

Constans was not well liked and so one of his generals, Magnentius, is elevated to the purple and starts capturing Constans' lands - Constans', without the support of the army, has to flee, but is caught and executed.

Constantius II would have dealt with this, but was busy fighting the war with Persia, so could not attend and so Magnentius marches on, and reaches Rome. However, another usurper, Nepotian, has taken hold there and so Magnentius has to contend with him. Magnentius captures Rome and so marches on, but another Usurper is given the purple - Vetranio.

Vetranio is loyal to Constantius, and effectively is elevated in order to fight Magnentius while the true emperor is at war. Vetranio was quite diplomatic and some attempts were made to have all 3 emperors rule together - however, Constantius II soon returned from Persia to fight Magnentius. Vetranio met Constantius and resigned as emperor - Constantius went on to suppress Magnentius and gained sole rule.

All of these men issued coinage (in (very) rough order of rarity: Constantius II, Constans, Constantine II, Magnentius, [Decentius], Delmatius, Vetranio, Haniballianus, Nepotian).

Thanks! I just posted the same time.
Very interesting story! Thanks for sharing this!