Model 1918 Swiss bayonet manufactured by Elsener Schwyz. Includes scabbard; no leather frog included.
Model 1918 bayonets were issued with the 00/11 Carbine, K11 Carbine, and K31 Carbine. As the serial number 231358 is out of the serial number range for the 00/11 and K11 Carbines, this bayonet would have been issued with K31 serial number 231358 in 1954.
While "Victoria" was added to Elsener Schwyz' ricasso marking beginning in 1950, this bayonet was likely manufactured before 1950.