I year or so later I purchased from the USA a KR-55B. Thinking that this would have all the same rhythms as the KR-55 and MORE. So I could sell my KR-55 ...
But, NO
The samba on the KR-55B just isn't Magnetic Fields 1 or 4. Korg have altered it
Later research on the web confirmed that the KR-55B was release in late 1981 / early 1982, therefore, too late to make the recording of Magnetic Fields. So this confirms for the record that :-
The KR-55 (the biege coloured one) was used on the Magnetic Fields album and not the KR-55B (the black one)
Although the 'B' version has twice the amount of rhythms (some being slight variations of each other), the original KR-55 rhythms are 100% Jarre.
Once I've painstakingly copied the KR-55B rhythm patterns to Midi, it will be up for sale. Unless someone already has a Midi file already they could send me
