When he was born, a little after, his dad and mom both died. So, his parents weren't able to present him before the courts and give him an actual birth certificate.
But we know that he was about a decade older than his wife, Dolores, so we estimate that he was about 90 years old when he passed away.
The story of that was that he died of old age. When he went to the hospital, he had a hemorrage, and the doctors weren't able to fix the problem.