I took some pictures at the Müzik Evi (music house) of Isa Oğuz, where he teaches children to play the saz (and sells musical instruments).
This is him.
Regarding the saz (or ‘bağlama’):
The ‘bağlama’ a stringed musical instrument shared by various cultures in the Eastern Mediterranean, Near East, and Central Asia regions. In Turkey, it is often referred to as the ‘saz’, although the term ‘saz’ more generally refers to a family of plucked string instruments, long-necked lutes used in Ottoman classical music, Turkish folk music, Azeri music, Kurdish music, Assyrian music, Armenian music, and in parts of Syria, Iraq and the Balkan countries. Like the Western lute and the Middle-Eastern oud, the ‘saz’ has a deep round back, but a much longer neck. It can be played with a plectrum or with a fingerpicking style.
The most commonly used string folk instrument in Turkey, the saz has seven strings divided into courses of two, two and three. It can be tuned in various ways and takes different names according to region and size: Bağlama, Divan Sazı, Bozuk, Çöğür, Kopuz Irızva, Cura, Tambura, etc. The cura is the smallest member of the saz/bağlama family: larger than the cura is the tambura, tuned an octave lower. The Divan sazı, the largest instrument in the family, is tuned one octave lower still.
There are also electric bağlamas, which can be connected to an amplifier. These can have either single or double pickups.
Correspondent: J.M.Criel, Antwerpen.
Source: Wikipedia .