I know absolutely nothing about roman/byzantine/ancient coins, but I found this in a lot, think it is quite nice in it´s own way, and would very much like to know what it is. Is it possible to identify it, and if yes: do you care to try?
Roman Imperial, a bronze follis of Constantine the Great. Appears to be Trier mint, but I cant make out the mintmark (the two letters in the exergue and two or three in the left/right fields). The reverse shows the sun-god Sol Invictus.