First off, congratulations on a truly beautiful buck with tons of jaw dropping, conversation starting head gear! I have to admit that there is only one way to truly "guess" this specimens age under the given information. We will need stand location, weather conditions, date and time of harvest. If you are willing to give any additional information such as: camouflage, cover/attraction scents, and choice of other gear.....it would be appreciated and would be used solely for getting a better idea of this deers age. (Hopefully everyone realizes that this is just a congratulatory post?!) But I say 4.5