I tend to favor your analysis JustMe. But there is that line about it being ten years since there had been a celebration in the house (Connie's wedding). Therefore, if Vito died in 1955 and if he comes to America in 1901 and if he is about 12 twelve when he does so, that makes him 66 at death. Then there is the line in GFII when the Senator asks Mike about the muder of the five families' Dons in 1950. I just can't fathom it being almost ten years from the time of Sollozzo's murder to the muder of the family heads. I'm more comfortable with the early fifties.