Hi John, i've had the neck off. There was a remanence of a sticker there but no answers unfortunately. I've seen some electrics in a Tokai made P bass which are very close but actually I've come to think its a well made Columbus. I have only pics to go on but ive found a few that seem identical to all the detail I can see.
Its a shame, if it is a Columbus for all the bad rep because I really love playing this bass. Sure, new Fenders considerably better but there's no doubt this does the job and it feels like your playing history.