Czerny 100, Czerny 30

This is a collection of Czerny's 100 and 30 exercises.

Thank you for looking.
This is an old music score, so there are stains and fading, but it is fine for playing.

On the 100 exercises, pages 4-17 have markings.
On the 30 exercises, pages 16-69 (all pieces) have markings in red pencil, as shown in photos 3 and 4.
We would appreciate it if you understand that this is a used item.
Thank you.