IMHO, it's possible that he's 2 in that pic, but I think you're right. He's 1 1/2 in that earlier pic of him. He looks awfully young, and it's just my gut here, but the antlers also lead me to believe he's 1 1/2 then. Of course there are a ton of factors that effect antler growth. As I said, I think you're spot on though.
I read an article about a guy in Oklahoma that shot a 200" deer that was aged by two different biologists at 2 1/2... I think your 3 beamed beauty was just a big 1 1/2.
Im sure I speak for everyone when I say that we're all pulling for you to stick that guy!