My 68 was bookless but I assembled one with the correct year from various ebay purchases--when collecting mine I noticed that There are variations year to year for when things like Auto trans became available, but the bulk of the book is the same 68 through early 71 cars. From memory, my 71 1600 has a Owner's Handbook, Service records Book with stamps (this is the book that will have the original owners name, date of purchase, dealer signatures, etc), US Handbook Supplement, Service Stations Overseas book. I also have a yellow battery card, but nothing for the dealer installed Becker or Red Tip. I may have an extra 2002 handbook and supplement from 1969 if your copy is tattered.
Ben