I have two of these, the most interesting is tabbed into 14 sections with hundreds of factory bulletins dated between approx. 1964 through 1967 on the distinctive blue information sheets. Great reading and in very good condition, the binder shows some wear but the index tabs and pages themselves are in quite good condition, best reasonable offer. The second one is a bit later, up through 1970 and organized 10 through 80. Also a supplement for air cond. public. no. 1969- 10/1972 (1000) This one is also in very good condition with a better binder.