Up for sale is an authentic, original OEM International S-Series Electrical Circuit Diagrams Manual. This factory service schematic specifically covers Regular Cab, Flat Back Cowl, and Bus configurations.This is a genuine vintage fleet vehicle reference guide—not a modern photocopy or reproduction reproduction. It features full vehicle schematics, wiring color codes, and fuse box terminal callouts. Marked on the cover with the classic factory warning: "DO NOT REMOVE FROM VEHICLE."Condition Notes:The manual shows authentic vintage wear from garage use, including light smudging, corner creasing, water damage and minor aging on the paper as visible in the photos. The text and full schematic grids remain completely legible and functional for restoration work or mechanical reference.