The Chess Partner 6000 is surprisingly rare. Until 2008 there were no examples in collections published on the internet, nor to my knowledge had anyone in the chess computer community actually seen one. You can read more about it in an article by chess computer historian Hein Veldhuis (link).
Like the other SciSys Chess Partners, the Chess Partner 6000 is a simple machine of very limited strength and features intended for the mass market. It boasts only four levels of play and a press sensory board. In common with several other SciSys models it uses a Hitachi HD44801 4 bit singlechip running at 0.4 MHz with 2KB of program ROM and 64 bytes of RAM and Mark Taylor’s (+David Levy) 4 bit chess program.