Help to remove a cartridge

[XavierLP]

Hello

I'd like to have some advice to remove a cartridge n my shower.

I've got the same that John75
https://www.diynot.com/diy/threads/can-you-help-identify-my-shower.337936/

But for my part I don't find the way to remove the black part where I could read the identification number.

zoom bouton

• XavierLP
• 15 Sep 2019

boutons

• XavierLP
• 15 Sep 2019

focus bouton

• XavierLP
• 15 Sep 2019

I didn't fins any screw. Do I had to pull it ?

Thanks for your help