This Suzuki Original Motorcycle Wiring Diagrams book is applicable to their range of 50, 80, 100, 120, 125, 175, 185, 200, 250, 370, 400, 425, 500, 550, 750, 850 & 1000cc models (see Images 2 & 3) that were in production during 1979. Produced for the trade workshops . 

There are a few scuff marks on the spine and corners  but all spine and pages uncreased and intact  

Ideal reference material for Suzuki.