Good afternoon. New member and not a big knife guy (mostly firearms). Can anybody help me out with ID'ing the blade below? I put a ruler in the picture for reference. Not a great pic, but the entire knife is 18" long. I cannot find any maker's marks or other markings anywhere on it. I am not sure if it a period item or a reproduction of some sort. I am not a guy hoping he has a valuable item or asking for a value; just looking for more info. Thanks.