There are two main versions of the Chess Companion II.
The first version SciSys Article 204 arrived in 1983 when it sold for £59.95 in the UK, at which price it was good value and sold well. Most have the larger box, a fatter case, a chesspieces compartment beneath and a battery ‘module’ which detaches from the case for insertion and removal of the batteries. In size and chesspiece compartment it follows the original Chess Companion (Art. 203), though that machine is mains power only and has an entirely different pcb.
In 1985 a revised version of Art. 204 was released including by the distributor Quelle in Germany (Catalogue 109.211 3). This version has a slimmer case, no chesspiece compartment, and an integral battery compartment. Apart from colour this model is identical to the SciSys Olympiade which seems to have sold in only small numbers, mainly in France.
Both Chess Companion II versions use the same Kaare Danielsen 4K program. This is to be found on all the 0609V171 bespoke singlechips also seen inside the Explorer, Olympiade, Mark 8, Concord and Concord II.