Bosphorus Cymbals is owned by three master cymbal smiths: Hasan Seker, Ibrahim Yakici and Hasan Ozdemir who have been making cymbals by hand since they were in their teens. The name of their company is Bogazici Zil, which is Turkish for Bosphorus Cymbals.  They ar ehand made in in Istanbul, Turkey.   Bosphorous does not make cymbals for any other company or market cymbals under any other name. [Source: myspace]

Background from Drum Junction

Image eBay:Bosphorus cymbal logo