Old stager

The case has lost its cover
The battery holder is missing
It's 37 years old
The blurb (which I still have) expounds the full mathematical functionality
When you do a log or ln or inverse trig function it has to turn the screen off because the memory is so small.

surprisingly the sine of 76 degrees is still the same as it was when I bought it - cost £27 (I was earning about 2 and a 1/2 grand a year then!)

I'd hate to have to learn to use a replacement