Again I would like to solicit the knowledge and opinions of our Tea cloud

Got around to take pics of another pot which I inherited from my wife’s family.
As so often information on provenance is sketchy at best…
It does have a nice ring to it, so probably higher firing.
Can’t detect any visible wheel throwing traces.
Stamp says Zhonguo Yixing, but that in itself doesn’t say anything

Single hole.
Lid is slightly loose, but pot performs well.
Stains on the pictures are from use and not cleaning.
Color is a reddish orange in real life.
Slightly grainy surface.
Not a lightweight.
All in all the pot seems to me made of better material than the three other pots I had previously posted.
Guesses?