Dutch was 53 when he died in 1911. If the game takes place 20 years before that, he would be 33. Looks older here to me. I would say he is about 38-40. Based on that it would mean it is no more than 15 years prior to RDR's 1911. That would be 1896 and he would be 38. For good measure I would say he is 40 here though so 1898 is my guess.