These bayonets were manufactured at the beginning of 1913 and were used on several firearms up to WWII. It is very similar to it's predecessor, the British P1907 bayonet but the P1907 muzzle-ring is closer to the blade rib while the Model 1913/1917 sits about 1/2" above the rib.
These were originally manufactured for the British Pattern 1913/14 Enfield rifle which was based on the Mauser design and not to be confused with the British No.1 SMLE series which will accept the British P1907 Bayonet.
The bayonet examples made for the U.S. such as the above example, are secondary stamped "U.S." below the canceled British inspector's marks. The reverse is stamped with the model year "1913" with manufacture month and year stamped below that. In this example it is 6 17(June 1917). This bayonet is almost identical to the U.S. Model 1917 bayonet but it does not bear the U.S. Military "ordnance bomb" logo.
Manufacturers were Remington and Winchester with the latter being quite scarce. The blade is made of steel and the grips are of wood with two horizontal grooves cut into the wood grips, these can be found with or without an "oil-hole". The two horizontal grooves that are cut into the grips was done so on purpose so that the American G.I. would be able to tell if he had the correct bayonet for his rifle and not the one used for the Enfield. With-out the grooves it is very difficult to tell the two bayonets apart. The scabbards or sheaths were an olive drab color. They can be found in either fiberglass or leather with steel throat, drag, and belt hook.