OK, I obviously have poor images to deal with here, as do you, but I'm initially seeing this (red-line) shape as a consistent thing (and as a starting point, because there's obviously an upper part, connected or separate). Below are a list of points your images raised for me. (edit to add this cropped image for ease) The key thing for me is the first image (top left) which has a 'knobbly' pomegranate-like surface, which I can easily see as flattening to a letter shape when not fully struck up or worn (the beginnings of which can be seen in the fourth image along [top])? The pomegranate punch is obviously knackered, as shown by your two larger images. Would there have been any attempts to 'doctor' it on the die? Can we rule that out? I'm surprised to see the shape (?overmark) so precisely placed on this many examples, given the size of the coin? Could there have been some recutting of the punch itself, only to make it more knobbly and palatable as a pomegranate? Given the fractures in the C-shape, is there any possibility that there were two 'bobbly-pomegranate-L-shapes' used to improve/enhance the broken mark on the die? The upper part struck first, perhaps, and the lower, second part (the bits I've drawn) laid in on top (though the amazing consistency of positioning probably rules this out)? Your investigation will be an easy thing to prove, one way or another, we just need some really high-grade examples/images, which span the disintegration of the pomegranate and appearance of this anomaly?