I used to run Windows 95 on my old 486 DX2 laptop. If you could find a disc for it, that might work for you.
Oh, and here's a REALLY old laptop. It's a Tandy. This obviously isn't mine, but I do have one of these sitting in a box somewhere. Amazingly, it still works. It ran on AA batteries if i remember right.
Hard to tell the size of it from this picture, but it was about as big as most laptops are now.
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