The main design on the reverse side (bottom coin) is called a tughra (or tugra). The proper orientation of the coin would be to rotate the bottom coin 90 degrees counterclockwise--so that the three 'fingers' are pointed 'north'.
Different fanciful theories have been advanced to explain the shape of the tughra. One romantic suggestion is that it represented the form of the fabulous bird the tughri, the totem of the Oghuz tribe from whom the Ottomans were descended. Another, and the one I prefer, is that it represented the thumb and three fingers of Sultan Murad I (1356-1389) who, it is alleged being illiterate, dipped his thumb and three fingers into ink and made his mark on the page – a form which then inspired the tughra.
Don..........