From what I have seen at Mini Club meetings in the period sales brochures, and other cars the seats in the pics look like the tough as old boots 68> Deluxe, Matic, K, Cooper seat pattern and material (although I think Cooper trim was mostly just black). The 65-67 Deluxe certainly had different patterning again.
Morris 850 trim seems to have typically been two toned vinyl trim (also in the door cavities), kinda of a rough, dimpled/orstrich skin patterning on the main wearing parts of the leading edges of the seat bases and tops of the seat backs and smooth vinyl of a darker complimentry colour on the fluted main seat and backrests. Colours like two toned bathtub Greens, sky Blues, Red/pinks, etc sometimes in a strong contrast to the paint.
Light/White body paint = pink/red or sky blue trim. Dark/Black body paint = pale green, blue interiors, etc.
Cooper = all black regarless of body colour.
Might be wrong. Often am
Pity there is only the "Original Cooper" book and not one to cover all the Minis.
(but I'm no expert).
