Gobbler age is not necessarily a science. Jakes are obvious but beyond that it can be difficult. Now, generally but not always, a 2 YO will have rounded spurs 5/8" to 3/4". Beard length doesn't matter much. Where you really have to be careful is assigning spur length to age. I still remember a sidebar re:turkey age I saw in a turkey magazine years ago. Back when MO was trapping and transferring they tagged a fall jake and released him in another county. At that time, you had to bring all bagged turkeys to a check station. Well, that gobbler was killed later and checked in. At the check station he had a 9 1/8" beard, weighed 19# and had 1 1/8" spurs. Per his leg band he was 9 years old. So moral of the story: jakes are obvious, 2 YOs are pretty much obvious but not always, beyond that they're just mature adults.