However, the Catholic Encyclopedia commentary references the Charles translation circa 1893 - obviously long before the Dead Sea Scrolls discovery. This leads me to suspect the NJB translation of 1 Enoch is Charles'.
Again, I recommend Charlesworth's Pseudepigrapha for those looking for the most current, scholarly translation - comparing phrase by phrase via footnotes - the ancient 1 Enoch (Ethiopic) texts themselves as well as Charles' translation et al. Charlesworth's Pseudepigrapha also includes 2 Enoch (Slavonic) and Enoch (Hebrew.)
There just isn't a basis for comparison of his work to a single book translation.