On my 13th birthday, my brother in law gave me one of those new fangled "calculators", a Casio. This would have been in 1971. I used it all through high school, and when I moved away to college, I through it in the back with all my other junk.
Didn't see it again for another couple or three years, when I went to sell that car. I was cleaning it out and found it in the compartment where the spare tire was kept. It'd gone through that many Florida summers, in the trunk.
I did have to put in new AA's, but it worked fine for years after.
Wonder whatever happened to Casie?