Spinoo i wouldn,t worry too much these are all hand made and are all different to some extent, but some further investigation cant hurt, things that arent hand made are the things to check like decals hardware and electrics i,ve now got three bacchus and one on the way and the serial no looks different on each one of them including my two dukes and the serial no on them is only two digits apart, it,s as if each craftsman uses different tools and does it differently, yours is quite an early example and you should try to compare to ones of a similar era, you will have to do some detective work to be sure, posting some more detailed pics on here might help, underside of bridge and tailpeice front of headstock, pickup cavity and control cavity are a good start, one question springs to mind is the bacchus name inlayed into the headstock mother or pearl or just kinda plain white.?