THIS IS NOT REALLY MY FIELD BUT AS NO ONE ELSE HAS TAKEN THE PLUNGE HERE GOES.
I THINK IT IS A OLDER BLADE FROM INDIA THAT HAS BEEN REHILTED, BUT NOT WITH THE NORMAL HANDLE FORM. IT COULD BE ONE OF AT LEAST 2 FORMS THAT USED TO BE CALLED SCORPION DAGGERS BY SOME COLLECTORS DUE TO ITS RESEMBLENCE TO A SCORPIONS STINGER.
1. KHANJARLI, THE ONE WITH THE LARGE POMMEL ,IT IS THE ONE USUALLY REFFERED TO AS A SCORPION DAGGER.
2. BICHWA DAGGER
PERHAPS SOMEONE WITH MORE KNOWLEGE IN THE FIELD WILL PIN IT DOWN FOR YOU. GOOD LUCK