Original Heathkit Assembly Manual forTV Post-Marker / Sweep Generator Model IG-5257  595-1981-04 copyright 1977. Step by Step assembly instructions, applications and has schematic fold out from page. The book is softcover paperback with numbered pages 112. The spine paper  cover has 2 tears in paper but spine and pages are intact. Refer to pictures for measures and example of damage and table of contents.