Can't be a dieclash for two reasons.
1- It would have to line up with the relief somewhere on the reverse.
2. It would be raised.
I think what you see is the same discolouring as there is with
between the other letters that may look like an "M".

1- It would have to line up with the relief somewhere on the reverse.
2. It would be raised.
I think what you see is the same discolouring as there is with
between the other letters that may look like an "M".



























