Just ended.
http://cgi.ebay.com/ws/eBayISAPI.dll...ayphotohosting
The handle looks new to me ( see rivets) and the "ears", although quite thin, are perfectly intact.The bolster is re-worked ( see "footprint" on the blade) and is of strange configuration.
Overall, I think this is a heavily restored Yataghan and the project was done within the past several years.
But what really puzzles me, is the date. It is 1661 H, ie ~ 2240 Gregorian, which makes no sense ( unless one assumes that it is a Gregorian date written in Arabic numbers and the thingie is 400 years old

).
In regular photography, we would suspect inverted negative. Can it also happened with the digital technique?
Is it 1221?