A local bought one new in the mid sixties. He made his living with it 35 years.
Some people don't retire, they get tired. His business faded as more excavators took the jobs he once did. New houses got BIG.
One day i came upon his backhoe on its side on the edge of a brook 3/4? mile from his home. I later learned he had been found dead, run over by the left rear tire. What route it took, I've never known. The tractor travelled unmanned down a steep hill a very long way unmanned, until it flipped on the brook bank.
Later, it was found he had a heart attack. Seems he collapsed, fell in front of the wheel.
I've never known if it was the same machine, but an identical 530 Construction King became the only digger for another excavator. He made a sort of living 10? years with it. He played the disability game, got a SSI pension, but kept the backhoe. It has been on a used car dealer's lot several years for sale.
I can't estimate how many hours this thing has on it, I'll guess staggering!
My theory: There are a great many old Case machines in possession of hobbyist diggers. They seek advice for the many old age problems these tractors have due to age, wear, and neglect.