1 Last Coin To ID I Have Some Information

I read "...STANTINVS A..", which tells me it's a Constantine. Probably Constantine I (the Great), because Constantine II wasn't "augustus" for very long; most of his coins have NOB C. You've got the reverse right, as far as I can tell. Something like this one.

Augustus (meaning majestic, exalted or venerable) was originally the title bestowed by the Senate on the imperator (general) Octavian once he'd finished off all his rivals. The end of the Republic and beginning of the Empire is generally reckoned to be the date this title was bestowed (16th January 27 BC). Octavian is regarded as the first Emperor and is better known to history simply by the title "Augustus". All subsequent emperors claimed this title for themselves, as part of their claim to being the legitimate heir of the original Augustus.

When Diocletian reformed the imperial government in 293 AD and created the Tetrarchy, he formalised the system which had in fact been generally used for over a century: the senior emperors received the title "augustus", and the junior emperors received the title "caesar". These titles continued until well into the Byzantine period.