Things You'll Need
Instructions
Remove the bayonet attachment from any rifle to which it had been secured. Wear rubber gloves if you're concerned about affecting the bayonet's condition through handling.
Lay your bayonet on a table and find the part of the blade called the ricasso. The ricasso is the bottom part of the blade, nearest the hilt. Often, the ricasso is flat and has not been shaped like the rest of the metal blade.
Inspect the ricasso for any markings. Use a magnifying glass if you're having trouble discerning them. Normal markings on the ricasso include the bayonet maker's name, the manufacturing date, the date of issue and inspection stamps. Inspection stamps indicate the bayonet's country of origin.
Consult reference material on bayonet identification. Inspection stamp styles have changed over the years and records are sparse. Research materials and member forums can be accessed by contacting the Society of American Bayonet Collectors (bayonetcollectors.org) or the Bayonet Collectors Network. Popular books on the subject include "Collecting Bayonets" by J. A. Maddox and "Bayonets From Janzen's Notebook" by Jerry L. Janzen. Research all available reference materials until you have identified your bayonet's country of origin.