AutoCAD 1.4 circa 1984/85 and the Space Shuttle drawing by Autodesk founder John Walker. This is one of the earliest known DWG sample files used to show AutoCAD-86.
I captured this on a retro 286/287 that I run in my home office for geeky fun.
Update: Here is the AutoCAD 1.x sample file, one of the earliest sample files from 1984.
Download SHUTTLE.DWG (7.1K)