Honorable mention for my truck. 1997 F-150. Turns 28 this year, just put a rebuilt motor in it, hoping for another 20 years.
A pair of toe-nail clippers my grandfather gifted me. I'm guessing late 1940s. As far as I can tell, it was something he bought from the on-base military store as things were winding down after WW2. It's rugged in a way you wouldn't expect - it was clearly built to last, well, indefinitely. Has this excellent leather carrying case in military olive green that is also wildly over-designed. Not flashy, just built to last.
It really makes me appreciate - we used to know how to make things here (USA). And we were so good at it, even the dumb little things could be built to last.