The obverse seems to me somewhat unclear, however, I see nothing unusual with the legend.
The reverse is even more unclear, there seems to be some damage at 1 o'clock, which obscures the legend, so I cannot see if it was originally MA or, as you suggested AM(?).
Due to both sides depicting the coat of arms, I noticed that sometimes the eagle side is deemed obverse, however, the pogonia side quotes the king's name. I think, your catalogue is structured the same way, I described above.