This little booklet dates from the early 1960s.  Somehow there are still a few Sav-On stations scattered around, though we doubt they would honour the terms of this promotion:  get some stamps each time you bought gas there, fill the book, and then turn it in for a cash discount.  The book is full and unmarked, even if a bit beaten up.  A real relic of a time when gas in California was only about 25 cents a gallon.  Grade: 2