Hi bhushan,
To get an understanding of the different types of kukris (or khukuris), I'd recommend looking at
Himalayan Imports, particularly
http://www.himalayan-imports.com/faq..._Dynamics.html. Note in that these are all modern production knives, not antiques. However, this is one of the few places where the different shapes of kukris are presented for comparison.
To my knowledge, the M-43 has a
pronounced curve that yours lacks. As Berkley stated above, your kukri looks like an Indian army piece. The confirmation would be an arrow maker's mark<- near the hilt. They're still made and sold on websites like
Atlanta Cutlery.
F
Note: links to stores are for information purposes only, although I do own several HI khukuris.