Quoted from Toine79:Thanks.
Strange about this cabinet is the fact that the SN is a 52017 instead of a 50017
If you look up IJ on ipsnd.net you'll find a whole bunch of other 5--17 prefixes other than 50017. Same is true of many other B/W games from that era. I always wondered if the second and third digits of the serial number had to do with the build date, shipping state or country, or who knows what else.