The Vintage SNAP-ON Generator Regulator Alternator Tester Instruction Manual is a comprehensive guide specifically designed for users of Snap-on generator regulator and alternator testers. Originating from the United States, this manual provides detailed instructions on how to properly use and interpret the results of the Snap-on testing equipment. This manual is a valuable resource for collectors or restorers of vintage automobiles, as it contains specs for the charging systems of many of the 1950's and early 60's cars. LM 08/23/26