My 1950s Walker 4 ton air over hydrualic.
This thing is a beast
I want one of those, badly.
A neighbor had a 3 ton Walker that was a beautiful jack (this was around 1994). Long reach / high lift... I wish I had bought one like it for myself, then.
That 10 ton Walker I mentioned earlier, it dates back to 1976. Dad bought it when we converted the barn to a farm shop. It's great for trucks and tractors.