www.925-1000.com

I'm trying to date an Ottoman silver belt my wife inherited. The tughra, to me, looks like it could be from Mehmed V (27 Apr 1909-3 Jul 1918), but I'm not sure. Also, it looks like there is a 90 in Arabic at the 3 o'clock position. Am I seeing that right? The keyhole escutcheons are marked with what this site refers to as a Standard Mark. I don't know what the standards were or what this mark is telling me. I'd appreciate any help from the experts here. Thanks!

This kind of belts were deemed making in Trabzon. There is a 'sah' mark bears around the 'keyhole'. Yes, the tughra mark (tuğralar damgalar) is for Mehmed V, and the Arabic script is 'ayar 90' for the fineness.