Okay, let's look at what there is to see first. The lower photo seems to have an inscription in Latin similiar to British coins. There is a name on the left, looks like it ends with the letters "mat", followed by a separator dot, then a "II", so "....mat the second". Then we have D.G., the Latin abbreviation for "Deo Gratia", meaning "by the grace of God", followed by two each 2 letter groupings I can't make out, and then the word "REX", meaning 'king'.
So ".....mat the second, by the grace of God, (something), King. Same pattern used on British coins.
Maybe I am stating the obvious, but that's all I have! Did you dig this one up yourself, perhaps in England?
That is the mint mark, and it represents "Körmöcz-Bánya" (Hungarian) or "Kremnitz-Bergstadt" (German). It happened to be one of the most productive mints in the late Middle Ages and early Renaissance, and produced coins right up until the 20th Century. Read more about it here: