Young Ben, Old Ben, and Jacob,
I am not sure if this has been proven, or this is still a theory to be proven. Young ben, bullet hole ridden ben, is in the 1970s. While, The older version of ben, the one we have grown to know and love is currently on the hydra island: What time frame is old ben in? I remember seeing a jughead comic ( printed in the 1950s ) on the desk at the hydra station. This means ben would have all the knowledge for the events that will unfold for the next 50 years.