I have had a large knife (total length 12 1/"; blade length 7 1/2") for many years. At one time I think I knew what it is called, but unable to remember. The top of the blade looks like a duck. I do not know if it is a military or hunting knife and when it was made probably. I have tried googling under duck and knives, but to no avail. Any help anyone can provide about what this knife is called and was used for would be greatly appreciated. I tried to post a picture of it from the gallery on my computer, but unable to do so. Thanks.