Rifle Rear Sight Identification

I apologize if I'm in the wrong forum. I've been trying to identify these three sights and cannot nail them down. Does anyone recognize them? I would appreciate the help. Thank you.

https://www.milsurps.com/images/impo...d4xQPemo-1.jpg

https://www.milsurps.com/images/impo...4Rf2tJZA-1.jpg

https://www.milsurps.com/images/impo...1a6MAQko-1.jpg

https://www.milsurps.com/images/impo...9TVLafRQ-1.jpg

https://www.milsurps.com/images/impo...1zVF1QPe-1.jpg

https://www.milsurps.com/images/impo...5WighzcO-1.jpg

Sorry if this is not a precise answer - I am going by my feeling for style - but it might help you to look in the right area.
One at left is of a French/German smallbore trainer or plinker
One in centre is Germanic
One at right is also from a smallbore trainer or plinker, maybe French. reminds me of the MAS36 sight.

OK maybe just guesses, but it gives you a direction.

Yes, one at right is the MAS45 (smallbore-trainer version of the MAS36, made post-WWII)

The one at centre, scaled 100 to 1000, looks like something from a carbine or the Mauser C96 pistol (my tip).

Yes, the left hand sight is from a .22. I removed one from a scrapper once, but do not recall the make.

the centre sight marked to 1000m is Czech manufactured for the German contract G.33/40.

Too bad the sight base ring has been hacked off.

Thank you all so much for the help. I very much appreciate it.