The Vatican Library has digitised Codex Vaticanus. It is an majuscule manuscript that dates to the mid-fourth century and contains almost the entire Christian canon in Greek, including most of the Apocrypha.
I spent many hours with my friend “Vinny” Vaticanus when I was working on my 1 Esdras commentary. Wish I had this on hand when I did that study.
See it here!