1955 Snap On KR-56
I did not own it from the beginning, but this is the first high quality tool chest I bought. Spent $40.
I never restored it (as was the initial plan) and it will not win any beauty contests, but it is used all the time and keeps me happy.
My second one was 1963 KRA-58B. It's in better shape, but some of my go to tools are in the first one I bought this it's used more frequently