I totally agree but the thing is, as XtraSmiley said, why to pay Japanese PCB prices for a board that does not have original Japanese EPROM stickers.if your thinking original roms/stickers make it valuable, just remember that the lifespan of konami maskroms is not great.
in a few years it will be a case of "original" or "working" but not both.
How to be sure ?I'd say the pots are original. The same Konami board sometimes use one type or another.
Notice that far right EPROM sticker? It looks very new and clean compared to the other two...what about this ? Its the japanese version of violent storm