THREE SUN EQUIPMENT MANUALS, 2 MANUALS (1954 &1957),  SHOW THE DIFFERENT TEST EQUIPMENT AVAILABLE , THE OTHER MANUAL "1950 ", 31 PAGES,  (THE BROWN ONE)  IS A VOLT AMP TESTER INSTRUCTION MANUAL. SHOWS HOW TO TEST GENERAL CIRCUIT,GENERATOR, REGULATOR, BREAKER, INCLUDES FORD, MERC, GM (DELCO)  ALL ARE IN USED BUT GOO CONDITION FOR THEIR AGE, THE BROWN ONE HAS A FEW TEARS   (SEE PICS)