I don't see any RES in your photos snrub, but there's a LOT of GSF showing through. The mouth looks a little small to me for a "pure" Greenie, I'm thinking there is some BG in there, somewhere or sometime.

"Forget pounds and ounces, I'm figuring displacement!"

If we accept that: MBG(+)FGSF(=)HBG(F1)
And we surmise that: BG(>)HBG(F1) while GSF(<)HBG(F1)
Would it hold true that: HBG(F1)(+)AM500(x)q.d.(=)1.5lbGRWT?
PB answer: It depends.