Apple Computer, Inc. printed schematic entitled "Circuit Schematic, Main Logic PCB, Apple II," six pages, 17 x 11, approved by Steve Wozniak on October 26, 1978, stamped in red, "Unreleased Preliminary Information, For Prototype Purposes Only," and dated July 9, 1980." Labeled as "Drawing Number 050-0006-03," the schematic features the faded facsimile approval signature of Steve Wozniak ("Woz") in the lower right. The schematics have a few ink and pencil revisions made throughout. In very good to fine condition, with light scattered staining and handling wear.