What is often posted online is not necessarily true and needs to be further researched to determine facts. I am not so sure what Hada posted about it being Mongolian is true. I just skimmed the history of Mongolia on wikipedia and found nothing. It also stated it came under rule by Tibetan Buddhists when this knife would date to and Buddhists did not condone animal sacrifices, killing, or human sacrifices so I find it hard to believe this knife is Mongolian. It is likely from India where Hindus ritually practiced animal sacrifices. I would think by the shape of the blade and the animal head on the handle that this is a khanjar from India. Khanjar blades are double edged and it is hard to tell if your knife has been sharpened on both edges at one time. With the animal head on the handle, I would think this knife was used in animal sacrifices and not human. You would need an expert collector of foreign knives to really tell you what you have.