Also note that it's his 67th birthday. Since the party was held in December 1958, that'd give him a birth year of 1891.
What's interesting to me is that, in a deleted scene after Sr. Roberto leaves young Vito's office shaking like a leaf, young Clemenza introduces him to young Roth. Vito looks to be about 30 in that scene; Roth looks to be 17 or 18. But, the birthday cake in Havana would make Vito and Roth about ths same age.
Maybe he just looked young. Obviously at that point his ticker was still in good shape.
In the "Who Gave the Order" Scene Rothy talks fondly about Moe Greene, and he refers to him as a kid who he mentored. Now Moe was older than Micheal, maybe around Santino's age. I am guessing that puts Roth as a contemporary of vito, and maybe thats why they deleted the scene of the younger looking Roth.
