I'm sorry to have to ask so much, but I am a stickler for trying my best to get things properly ID'ed... This coin making my eyes go cross eyed trying to figure out the exergue so that I may find a proper ID for this coin, yes I have several guesses however I am hoping yours will be better than mine..?? I was also wondering what the maker was thinking with the "M" on the reverse, can it be more of an N..?
Your mintmark looks like palm branch TESB palm branch. I also seem to be able to make out part a star in the lower part of the wreath (maybe) which would make it RIC VIII Thessalonica 228. I have attached an example from the first workshop.