Refering to Stone's Glossary ....I appreciate that some of his ideas are inaccurate.....I found under 'Kindjal' a pic of a curved example. The construction (of a kindjal) fits my example ie
He writes...
...Occasionally the blades are curved.....The hilts are straight in the grip with broad pommels and an enlargement of nearly the same size and shape next to the handle. The grips are often of two pieces of horn rivetted to the flat tang.....The scabbards are covered with leather..
So the question is ....is the knife a jambiya or a kindjal based on the design of a jambiya ? The blade is quality steel, something, a number of jambiyas seem to lack