I forgot to update the thread, but I found it here.
I bought it from @Gothic here as defective board, with two marvelous artworks… I got a very good deal and my technician repaired it replacing IC 4D, 8L and 14E and converting the ROMs to a coherent ROM set. Originally it was a Makaimura B, but back then it was “somehow” converted to some GnG (but still with the cross)… now it’s a Makaimura G (but I still have the original chars rom MJ01 which is different between B and G along with the three program ROMs).
I’m very happy and @Gothic is a really nice and great guy to deal with, I very very recommend him to anyone.