Not the oldest thing I own but one that I still use when a job requires it is my Grandfathers Estwing hammers. There is a 16 ounce finish hammer and a 22 ounce framing hammer, both with stacked leather handles. He always kept the leather varnished and they are in really good condition. They have to be from the early 40's and speak to me when I have one in my hand.....