This rare find yielded a bundle of Tune-Up Primers in like new
condition. The Tune-Up Primer, sometimes called the Yellow Book,
contains tune-up specs for American cars from 1964 to 1972. It was
small enough (3½"x5½) so that old time mechanics kept it in their
shirt pocket or toolbox. They are for sale at $10 each (check or
PayPal) includes postage. They won't last long so order now!