You are purchasing a prototype Apple TechStep diagnostic tool.  A friend who was an Apple engineer on the TechStep development team gave it to me in the early ‘90s.  It includes everything included in the pictures; nothing more, nothing less.  While I do not guarantee its functionality, I will tell you that it works, as I have used it many times to diagnose different machines.  Please inspect my detailed pictures and feel free to ask any questions.

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