Oldguns.net has a pretty good look up page for the C96.
It'll narrow it down sometimes to a few yrs +/-.

Mauser Pistol C-96 (Broomhandle) Manufacture Dates


Lots of small details separate different models that otherwise look alike.
They can be confusing. Like any collectible, condition and originality is key.
Many 1000's were imported from China to the USA in the late 80's and early 90's. All sorts of Models and configurations. Most saw hard use with little care. But there were some good examples in the bunch too.
Being post 1986 imports, they were 'Import Marked' at the time.

Matching parts ser#'s is a big value determination factor much as it is with a Luger and other foreign handguns and rifles.

That ammo pictured is probably Tokarev or PPSh type ammo. It's in 8rd stripper clips. The C96 takes a 10rd stripper clip.
I would stay away from any mil/surplus ammo in the C96 also. It fits,,it goes bang,,but I've seen 2 nice C96's ruined with the stuff.

Make sure the TD latch is down & fully engaged into the frame cut.
It looks like it sitting a bit high in the pic but it might just be that,,the picture.