Most famous of the artists recorded here (10 tracks) is the Iraqi Jewish singer Salima Murad (1970-1972), listed here as Sitt Salima Pasha, as she was also known. Her tracks are all from the 1930s.
Also worth hearing are two tracks from Sitt Mounira Hawazwaz, another female Jewish Iraqi singer. Two tracks from her, also from the 1930s.
And also cool, a couple tracks recorded in Bombay, India, by Muhamed Abdul Salam, presumably a Saudi 'ud player and vocalist. Finally, six very nice tracks from Ustad Salim Rashid Suri of Oman.
You should check them all out. Like I said, a true treasure.