Probably some of my japanese wood working tools. It's hard to tell for sure though.
I buy all of my tools from an online discount store and they never have any known origin. It's difficult to date because Japanese tools are extremely traditional and a modern one can be indistinguishable from an ancient one.
That being said some of my tools show signs of extremely strenuous use and are definitely on the older side. Additionally they are made of wrought iron, it comes from raw pig iron and has to be hand forged and shaped. Most Japanese tools now use modern soft iron with exceptions being very high end tools and very experienced blacksmiths (making tools out of wrought iron is much more difficult).
After comparing images of Japanese tools from various time periods I estimate one of my plane blades could be from the 1800s. Mostly wishful thinking but definitely in the realm of possibility. Unfortunately the blacksmith that forged it was not famous enough to have any recorded information, documentation or mentions but it is still an exquisitely crafted blade, even if it's seen a lot of love.