That would be a “Targum” wouldn’t it, if it were an Aramaic bible from the time of Christ. I would think it would be pretty easy to tell if it really were that ancient, and I thought all bibles were scrolls back then.
The Codex Vaticanus and Codex Sinaiticus both date from the 4th century, and are the oldest known more-or-less complete manuscripts to bind most of the modern books of the Bible into a single codex.
Prior to the popularisation of the codex format there was no such thing as a “Bible,” since the different books were kept as separate scrolls.
It is not unusual to find scrolls that have been cut up and bound into books.