Nice finds!! The unmarked bayonet is a combat bayonet and not a trainer (saw you posted on Gunboards as well). It is a “Navy Special” bayonet. They are unmarked and the rubberized scabbard is correct for it as well. They usually bring a good premium over most common Type 30 bayonets so it’s a great pickup! The Jinsen is a keeper as well!
he guy I got the lugers from had a milk crate of bayonets and fighting knives, He had a couple of 1907 that were nicer but sold them before I got there. I got the 1907, the late war Japanese , and the 1917 Remington from him also. Trying to get a NCO sword from him now(he has I believe 6) and helmets.
Good thing to look for on a 1917 bayo is for one that's stamped 1918. The earliest ones had British acceptance marks on them and are marked 1913 and are barred out then re stamped with US marks.
The one pictured here is a nice one in good shape. The little hole is for clearing mud and debris from it.
Most of the US bayonets were affixed to the rifle with a band. Some are designed to not touch the barrel or as little as possible and were fixed to a lug like a gas cylinder on a garand or the nose cap of a SMLE.
An M17 with that bayo is a formidable weapon and a carry over from a pike to defend against horses or mounted riders.
Thats a nice trio of bayonets and good to pick up I think.