Other than land, what's the oldest physical object that you own?

[cksmithy]

99. My MIL's singer sewing machine, one of the first electric sewing machines.

There are all sorts of attachments that make button holes, pleats, etc. (think Rube Goldberg machinery), which I have actually used, MIL kept the manual. It is in a beautiful piece of furniture with the top unfolding, the sewing machine rising. It's great. Probably early 1930.

I also have fossils that could range in age from 66 to 150 millions years of age that I bought as teaching props for my elementary school students. My husband has model T tools, we have a oil base lamp, that was used by his family and turned into an electric lamp. A steel penny, and lot of things my FIL brought back WWII. He was a Seabee in the Pacific, we have pictures, we are not sure how he came home with plates from Germany, Morocco, carved African wooden animals and other things. Of course since he was born in 1911, we can't ask him any questions.