The first coin is Emperor Maximianus, with a reverse similar to this on Wildwinds: milne_4820.jpg (600×298). The example on Wildwinds has a B, indicating year 2, the different letter on your coin indicates a different year of his reign.
your second coin-- Constantius I A.D. 296- 297 FL VAL CONSTANTIVS NOB C; laureate head. GENIO POPVLI ROMANI; Genius standing left, holding patera and cornucopiae. In ex. S RIC VI Rome 66a the S in the exergue is actually a digamma — so it's 6th workshop