WOW!
Could you fix mine? I have one that doesn't turn on - no idea what's wrong. It is in very nice condition otherwise.
Actually, Gileno was sending you to an article and restoration I did this Summer.
I have now got 4 fully restored and fully functional HP 01 in the stable:
767Geoff
This one is a prototype, notice no serial numbers on the back case. I was told that actually this is a proto-prototype as the prototypes had one serial number inscribed:
Before and after on another steel type:
some others all lined up:
at work with a couple of HP: