NEW Newgin -- Basic Questions

[spoookie]

HI....I just picked up a slot reel Newgin and was wondering if anyone could answer some basic questions. I've attached a few pics.

Any idea what time period it is from? It's in great shape but seems a bit heavier than my other video pachinko. Any idea how to find a manual or some info on the machine?

Also, does anyone know what the yellow and red buttons on the front are for? They don't seem to do anything.

Of course I haven't gotten the fever round yet since I had to replace the glass and do some other basic stuff to get it working. But I noted the OPEN door has never opened! Is it supposed to open periodically, or only in the Fever round?

thanks much

dennis