Once you threw in the 205 dressed weight, there is little doubt that this is a 3.5 year old deer. I hunt near Fort Wayne Indiana and if the OPs info is right and I assume he killed it near where he is from (toledo OH) then we are hunting very similar deer on similar terrain. My experience from years of hunting this region says this is a 3.5 year old deer with a possibility that it might be a 4.5 year old. 200+ lbs deer are not unheard of in this area, but they are not all that common either (kinda like shooting a 4.5 yr old buck)