Thank you for the additional photos!
You are right. The scabbard appears to have the Turgha mark which makes it quite certainly Ottoman.
Also the wootz patterning, with longer streaks (see photo) does not look like the typical Indian (which tends to have finer and more uniform watering pattern) but Persian, so the knife might indeed be Ottoman (since many Ottoman weapons were made using Persian blades).
Yet, the front bolster looks so much Indian...