In the slide-show you find the following examples:
a) Static (used on Koran boxes etc. )
b) Reflecting Perpetual Movement (used on the backside of bracelets, Khanjars and Martini Henry guns)
Subject: Arabesque design
Period: Perpetual Movement arabesque used on older pieces, dating before 1890.
Origin: These type of items are typically found in interior of Oman. There may be a link to Persian art. We also find this design in the center of large old copper plates used for eating.