Here is a big one. The overall length is 17 1/2", blade is 12 1/2", 1 3/4" wide and 1/4" thick. It has a fuller on one side and plain on the other. Handle appears to be horn of some type. This came from a estate of a Civil War collector. There are no markings anywhere that I can find. Went over it with a magnifying glass. I`m not saying it is Civil War and want any and all info anyone may have. It will be greatly appreciated. Thanks in advance.