Estate Parts Find - Need help identifying what rifle they belong to.

[pertnear]

I found these two sights & a follower(?) at an estate sale this weekend. The sights are in excellent shape & move smoothly. The 3 items were packaged together in the same baggie. Can anyone ID these as to what rifle they belong & is the other part a follower? Thanks in advance for any help!
302703 302714

302715

[Der Gebirgsjager]

The dark blue part appears to be from a WW I vintage Gew 98 Lange roller coaster sight. The other two sights are from WW II era Mauserslike the K98k -- however, they could be from copies made in countries other than Germany as that rifle was widely copied.

DG

[KenT7021]

The dark part appears to be the tangent bed and spring from a 98k rear sight.The rear sights are Mauser but not from a 98k.

[WinchesterM1]

The rear sights I think are Yugo-M48

[WinchesterM1]

The rear sights I think are Yugo-M48

The curios BK is what gives it away

[dverna]

I am always impressed with the knowledge you guys have.