It's not too exciting, but I've got an old Lenovo EMC2 NAS that's probably from the early 10s. I was also running a Pi 1B as a DNS server until it gave up on life.

The oldest piece of tech I personally own and have running is probably my phone (going on 6 years). In the household it's probably our washing machine ('00s) - unfortunately the magnetron on our late 80s microwave just died :(

A OG gameboy transparent hood

A pan-clock, that is a clock that has the shape of a pan. It's probably close to 40 or more years old. pan-clock

I have a 600w ham radio amplifier from the 60s. It's a Heathkit SB-200

I'm very proud of it because I bought it in rough condition, and repaired it myself. Replaced all the leaky capacitors and did some other work in there. Now it runs like a dream! It was my first time working with tube gear. The voltages in these things is 2500 volts, that'll kill you dead before you know what happened.

I also have an SB-220 that I got broken. I fixed it up but didn't do a full rebuild on it. It'll do 1200 watts, but I don't need that much power so I haven't used it much. It's in storage. That one is from the late 60s early 70s.

My next oldest device is also ham radio gear, a Kenwood TS-530S from the 80s. There's a lot of solid state stuff inside, plenty of transistors doing all the work. But the final output stage is still a good ole pair of tubes. I bought this in non working condition, and fixed it myself as well. Good fun!

I have a a working box camera from 1930's. Or it would work, if I could still find film for it at a semi-decent price.

My Sansui 1000X - receiver amp is in daily use and was made in 1971, it's in near mint condition in every way. I did a complete internal cleanup and replaced a few electrolytic capasitors just to be sure to avoid any problems in the future. I believe the unit may well outlive me. I love the silverface-teak cabinet aesthetics. It's paired with a Lenco - L75 turntable from the early 70's and AR-7x speakers from the same decade, together they sound pretty much perfect to my ears.

And I also have my great-aunt's windable table clock. It's ~100-120 years old, but still works if only I remembered to wind it every other day.

Apple IIe even has a dot matrix printer still in operation (paper running low though)

But probably my oldest piece is my Beale upright piano, made in the 1920s, still beautiful, still hammering out music.

i have speakers from somewhere in the 1980's made in the soviet union

Is a wristwatch considered tech? My daily one is from 1971 and with a service it keeps time way better than a lot of new mechanical watches.

Olympus OM 10. Bought it second hand a few years ago, when I felt I need film cameras back in my life. Must be from the early 80s. I only use it since maybe 4 years now, but I love that camera.

Oh, while I am typing I just remembered my Braun Paxette from the 1950s. But I don't like that camera and thus don't use it. Planning on selling it tbh.

1955 Moskva-5 Camera in perfect condition.

Well, not that old, and even typing this hurts me (and apologizes to all that are hurt too lol), but I just played a lot with my PSP GO and my DS Lite this week, and in a related field Jackie Chan for PS1 in my Anbernic RG351V (old software in this case).