This is a very rare example of antique 19th century knife, the Bıçak, from the Central Asian Islamic Emirate of Bukhara, previously Turkistan, present - day Uzbekistan.
The shape of this blade differs from other Bıçak in ways that suggest it was created by an Uyghur smith. The Uyghur (Uighur, Uigur) are a Turkic ethnic group principally residing in the Xinjiang, China area called the Tarim Basin. However, there are significant diasporic communities of Uyghurs in Uzbekistan and elsewhere in Central Asia.