Apple Computer, Inc. printed engineering release schematic entitled "Apple Disk II Interface Circuit Schematic," one page, 17 x 11, approved by Steve Wozniak on April 25, 1978, stamped in red, "Apple Computer, Confidential" and "Engineering Release, This revision supersedes all previous versions. Please destroy all old copies." Labeled as "Drawing Number 050-0005-01," the schematic features the faded facsimile approval signature of Steve Wozniak ("Woz") in the lower right. In very good condition, with scattered staining and creasing, a couple punctures toward the top, and losses to corner tips, not affecting the legibility of the schematic.