When I was a kid in high school (1978-82), my sister dated the captain of the football team. He worked in a factory that made tweezers in Charlestown, NH one summer.
He brought me three tweezers, a pair of needle tipped, curved needle tipped and a more substantial pair that had a hook on the handle side.
I still have all three.
As I think about it, he was a year older than my sister, so he would have graduated in 1979 and probably worked in that factory that summer.
So, my oldest tools I still own and use are three tweezers I've had for around 44 years.
I also made some of those reverse clothes pin clamps that I still use. Those are probably older, but under 50 years old.
But, the oldest tool I have still in my toolbox is an old pair of fingernail clippers that I used when instructions used to tell you not to twist parts off the sprue. I think pre-1975.