It was advertised as a pre 1916 K98 bayonet. After getting it home (and paying a healthy price for it), I looked up the proofs and did my homework. It turns out to be an M1914 Pioneer bayonet that is Swiss proofed and made by H. St. manufacture. It fits the Swiss 7.5, K31 rifle. Not a very popular rifle and not very popular shells to obtain. it is a low serial number, but that means very little. I think I paid for an education. It is bad butt cool looking, I must say and chain saw sharp. Let me post a few photos of my learning experience. Having a little trouble loading my phone photos. I took an M1914 Pioneer photo off the web to show. I will continue to attempt to download my photos. I evidently don't know much about long guns. I really wanted this to fit a K98. With enough duct tape, it will. I promise you no one will be yanking on it from the business end. Top photo is the 2 foot monster attached on a K31 Swiss,
Jim