I’m new to stocks disks and I potentially might buy an M96 Swedish Mauser with an interesting disk. Can anyone help me out? And at what point were range plates added? View attachment 4205669

Plates were added during the WW2 era when the Swedes switched from the 156 gr m94 ammo to the 139 gr. M41 ammo. The Swedes thought plates were cheaper than new sights.

That looks like the stock of a pre 1903 rifle judging by the butt angle. Nice hunk of French walnut.

Here's a great site with info on disks as well as several other things. Go to the bottom of the page and hit return to index to see the rest of the site.

Stock Discs for 1894 & 1896 Swedish Mausers

 

It’s from an 1899 Overndorf. All matching which is nice

 

It's a unit disk - in this case, it appears to be for a "Landstormen" unit. The Landstormen were essentially militia units organized to defend specific districts where its member lived, generally those most likely to be attacked by a foreign enemy. They were attached to regular infantry units - in this case, that appears to be the 24th Infantry. The Landstormen unit itself appears to be "5b," suggesting it was split into two sub units, possibly by geographical area. It's a cool disk, and it is indeed interesting that it has survived replacement by the more common type.
(Edited to correct the infantry unit)

 

It's a unit disk - in this case, it appears to be for a "Landstormen" unit. The Landstormen were essentially militia units organized to defend specific districts where its member lived, generally those most likely to be attacked by a foreign enemy. They were attached to regular infantry units - in this case, that appears to be the 20th Infantry. The Landstormen unit itself appears to be "5b," suggesting it was split into two sub units, possibly by geographical area. It's a cool disk, and it is indeed interesting that it has survived replacement by the more common type.

Typo = should be 24 Infantry .

 

Two examples from Dutchman's site...(for educational purposes)...

 

Answered above but here is a quick reference to file away along with Dutchman’s excellent site.