I bought a Hampden Wm. McKinley on ebay the other night, arrived today. It's a hunter model in a hunter case- the case is pretty dirty, but in nice condition. There are no markings or serial number, only what looks to be the head of an Indian Chief, Tecumseh, I think. I will try to attach a pic.

That is a fairly Rare case mark by the Kenosha Watch Case Co., Kenosha, Wisconsin. In business for a few years through the 1890's.