I'm thinking this film's timeline almost has to carry into the mid '70s and that's where we'll see Tony in his late teens. It would be very unlike Chase to betray the original timeline of the show. We've already visited Newark in the late '60s at the time of the riots when Tony, as a little boy, hid in the trunk of his Dad's car and followed him and Janice to the carnival/gambling operation. Just my opinion, but I think it betrays the original series if Tony is suddenly 17 years old here. That puts him at about Silvio's age (or at least Stevie Van Zandt's), and less than a decade younger than Paulie (Tony Sirico). Tony's age was clearly stated on more than one occasion on the show. He was a young boss (The Boy King in Feech's words). He would have been born in 1959 or 1960 (Gandolfini was born in 1961). Maybe it shouldn't bother me but I know it will (if that's indeed the case).