What's the oldest tool you have ?

Mechanic's tools? I have a Plomb socket set from 1935. I got them from an old guy at a garage sale. It was his first set of tools, and a 16th birthday present.

Woodworking tools? I have a couple of Stanley planes that were made in the 1870's and 1880's. I use them quite a bit, but not as often as my 'new' planes, which date to 1902 to 1907.