Ottoman Court Dagger for Comment

[CourseEight]

Recently received this from ebay. A shame about some of the missing bits but still I thik its one of the nicest pieces I own. A lot has been written about these coral-decorated pieces in other threads, so I gather this is an Ottoman court dagger, from anywhere from the late 18th to late 19th centuries. I'm curious about the particular blade type, however, and whether the blade itself and the markings on it might narrow its timeframe. I haven't been able to find a piece quite like it...

Photos of the details of the marking on the blade to follow in a second post. The blade shows evidence of bluing, and the designs are etched in and then gilded around.