I have this
No idea what region it is.
Board seems like a legit data east board so its at least not the chinese variety of a boot that comes in a very different looking dirty huge pcb.
That said there are windowed eproms on it with windows covered by pieces of tape, I havent got the faintest idea if original board has these or not.
I´d say this is either original caveman board or there is a slight possibility someone converted some other compatible data east board into a caveman board with eeproms. I dont know for sure.
There´s no service menu or preboot texts or anything like that that would give any hint about region. theres just a data east logo and then it goes to attract mode. all settings are done by dip switches. I suppose thats how its supposed to be in an original pcb too.
Seems to work properly with no glitches or anything like that.
Shipping from Finland might kill this for you.
80 eur + shipping is the price. It might come to something like 150 usd shipped depending on how much it will end up weighing when packed properly.