Now that is a beautiful set. Those mystery bits have been subject of discussion before
http://www.vikingsword.com/vb/showthread.php?t=13900
No conclusive decision was made then either. The large hooks I THINK are for hanging the larger type Afghani flask, and I have attached a pic of one. There is a metal link on the back of these flasks which must be designed to hang on something....maybe those hooks.
Stu