I'm not sure if I rode in a United DC-10, But I've flown in DC-10s and United. Maybe your old man was the driver. I've flown KLM but they weren't DC-10s.
I had some friends that worked at McDonnell Douglas in Palmdale, California back in the early 70s putting these things together. That company was notorious for laying off workers just prior to their retirement.
I haven't seen a DC-10 done up in KLM before, it is a nice combination. Again, well done, RODC!