Original XJ12 sales brochures, assume 1972 or 1973.
One is 20 pages (A4 landscape) plus separate specification sheet (A4 portrait)
Other is 4 pages, A4 landscape when folded, opens out to A3 portrait for middle pages
Please see eBay listings https://www.ebay.co.uk/itm/335018850249 and https://www.ebay.co.uk/itm/335018841687 for purchase