Hi Gentlemen
some answers before attemp of translation (on way)
1) the mentions are in arabic, and shows an unity of engraver
2) no date, no name
only religious proclamations
2) the "magic squares" aren't strange, even sometimes associated with symbols, it's covers e.i.
- a shirt to protect the warrior during a battle, (pic joined)
- magical bowls called also healthy, or medical bowls
(pics upon request)
- back-pages of the Holy Quran (old hand-writting)
(pics upon request), etc..
those 2 last are from my personal collections 
à +
Dom