Your Oldest Tool Or Shop Equipment

I bought an enclosed car trailer this morning, it needs a little work. I had my son load up my floor jack. We used it to lift the tounge of the trailer, to hook it up. Well in our haste to get it out of the guys driveway, we left it there by accident. I didn't realize it until we had gotten to my dads house to store the trailer. We looked into the bed of the truck, no jack! Well we made do & got it unhooked from the truck.
Now its been an hour since we discovered it was gone. We returned to where we had left it. While driving there, I was talking to son & going over the history of that jack. I have owned it for 28 years, my son is only 22. Its been thru two cylinder rebuilds & has traveled more miles than my kids. If it was gone, I feared that I wasn't going to be able to replace it.
Well, I was very releived to see it when we turned the corner. It would have been like losing a family member.
So, what is the longest that you have owned a tool or a piece of shop equipment?