Oldest thing I own in a portable AM/FM/shortwave radio I got in 1980. I still use it everyday. Its so old it only goes up to 1600 on the AM band, instead of 1700. But I have no interest in the handful of stations between 1600,and 1700, anyway.
An uncirculared 1854 2 1/2 dollar Liberty gold coin my Great Great Grandfather brought back home in the midwest from Sacramento that year. Put it in a bezel on a necklace and my wife wears it. It will go to our daughter.
Uncirculated too.
In my basement, who knows. I’ve run across antiques and military surplus on Ebay for years and sometimes got a deal or two.
One is a steel “pot” helmet with a camo cover. No idea how old it is, WWII era probably.