This is an excellent quality Azeri Tar. 

Bowl: Walnut wood

Neck: Walnut wood

Peg: Walnut wood

Fingerboard: Camel Bone

Nut: Bone

It comes with a soft case.

The "Caucasian tar" or "Azerbaijani tar" or "11 string tar" is an instrument developed from the original Persian tar around 1870 by Mirza Sadig Asad(Sadigjanin) a slightly different shape from the Persian Tar;

The Caucasus tar usually has 2 double resonance strings via small metal nuts halfway the neck, and has one extra bass-string on the side, on a raised nut.

All these strings are running next to the main strings over the bridge and are fixed to a string-holder and the edge of the body.

The Azerbaijan tar is held horizontally to the player's chest, and there held in position with the right hand by pushing its double-bowl shaped lower part to the chest.

Playing the Azeri Tar commences by pulling the string using the plectrum held between the thumb and forefinger of the left hand. 

In Azerbaijan music, the Azeri Tar is used primarily as a lead instrument in the so-called mugham trio of singers, alongside the Kemence and Daf.