I have a copy of version 1.0 on 5.12" floppy diskette from 1988. Is this of any historical significance or collectable? On second thought, it looks like it’s a demo disk for version 1.0. Here’s a picture of the disk.
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It’s definitely cool
Lucky you. Does it come with the original version 1.0 source code also? 
I have 2.2 Mathematica, and it still boots also ! here is screen shot.
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Have you seen this? - http://www.mathematica25.com where you can find
The Mathematica Story: A Scrapbook
with a button to “Contribute your thoughts, pictures, and stories”.
Dear @Peter did you ever try to run these on any machine? Do they work?
Amazing, and very enjoyable!