You sound just like me with my boy Bryan. He is 55" and just shy of 2000 grams. God only knows how old he is, but it's double digits for certain.
He was the one that got it started for me and is the last one I'd part with. I thought he was normal for a long time but I've since found via breeding that he is almost definitely genetic granite. Regardless of morph, he is my baby no matter how big my collection gets.