What's the oldest tool you have ?

I have my Dads Snap on and Bluepoint tools from 1924.When he got his license the mechanic that he was doing his apprenticeship under gave him some of his old tools.
Snapon tools that have numbers like 1 or 3 , sockets had numbers like 160 or 180 or 200.
My son started to go through my Dads old tools and I had no idea how old those tools were.
Pretty cool.