You are seriously warped, you know that, right? Hee hee.

Bra'tac was 133 in 1997-98. Mind you, those are Chulakian years, and they have two suns a day. But anyway, it's a good rough guess. ("Bloodlines")

BRA'TAC: You choose your friends well, Teal'c. Though were I a hundred years younger, it might not have been quite so easy.

O'NEILL: You're over a hundred years old? God, I'm sorry.

[O'Neill reaches down to help him up but Bra'tac grabs him and throws him to the ground.]

BRA'TAC: A hundred and thirty three.

O'NEILL: You must work out.

Going by that, his age would be 100 in 1967.

Hammond was a Lieutenant in 1969, from which you should be able to give him a proper age, since ranks go by time in service. He'd be a lieutenant just out of college (or a military academy), and he would have to be a captain by X many years...I'd have to look it up/ask my military buddies if you really want to know. But he definitely wouldn't be in his thirties.

But whatever. It's an AU. Do what you want to do.