From up going down.. 1-Byzantine Emperor Justinian, struck in Nicomedia. 2-Roman Emperor Constantine, Campgate on reverse 3-Roman with VOT on reverse ( Number of reigning years) 4 and 5 in very bad condition 6- Roman Emperor Constantius II, with Falling Horse Charles
4 is a "B" countermarked coin, could be on a coin of tiberius, see here.. http://www.romancoins.info/CMK-Tiberius.html 5 is a prutah of herod agrippa