I have a Vendomatic sewing machine form the late '70s or early '80s. Still works like a charm. I still use it a couple of times per year to make/fix clothes or sew badges on my heavy metal jacket

Not tech exactly, but does a 22yr old Vicks inhaler count? It's somehow stuck around through every move, and I can still use it when I have a stuffy nose. It's kinda nuts...

A Galaxy S5690 Xcover phone from 2011 as reserve phone, software modded to be nice and fast. Not ancient, but as a reminder of what you could do with 200MB RAM (300MB is reserved for system) and 150MB internal storage. Btw, standby time is measured in semesters.

My dad is farmer, he has a water pump from 1971 still in use.

Probably my Canon 5D Mark II DSLR that I bought at launch (2008). Still works fine hundred of thousands of clicks later, multiple trips across the world, etc etc. It even still holds a candle to my current camera on the photo side of things (video specs definitely dated now though).

GameBoy Color with a single game: Pokémon Red.

Next time I was able go to the shop they had upgraded to GameBoy Advance and no GB/GBC games were to be never found again. It was the best/worst thing I ever got. :'(

contenders

1. my 2009 pc from ordi it for now is my olny computer but am getting an ThinkPad

2. my Thompson tv it still is used for now

3. Samsung Galaxy y i use it when my main phone is unable to be used but it's absolutely garbage since i the repair shop reinstalled the os so no google play store and it is heavily unused ehen i have to use it cuz of my pc

4. my Philips display used for my pc

honorable mention an radio and cassette player, i assume it's from like the 2010's

haven't checked it in 4 or 5 years but I think my Mac Plus still works.

Technically my doorbell, it's older than me.

Microwave from the 90's sometime. Still in daily use and shows no signs of stopping.

I have a spring/crank music box stuffed animal from when I was born (several decades) that still sounds perfect.