Presto. Compared the chord that Randy Bachman played against the original track and it sounds exactly the same to me. For anyone else interested in knowing what the 12-string chord is, pretty sure this is what he described:

1st string = G on the 3rd fret (pinky) 2nd string = C on the 1st fret (pointer finger) 3rd string = A on the 2nd fret (middle finger) 4th string = F on the 3rd fret (ring finger) 5th string = C on the 3rd fret (with the thumb, curl it over) 6th string = G on the 3rd fret (with the thumb as well)