Leitz Focometer sensor (OK?)

[mug]

Recently I was able to buy a Leitz Focometer . It also comes with a sensor which I wonder if it is still good.
The glass is not clear and has an irregular structure.
Does anyone have experience with this sensor? Can you tell me more about it ?

If photo is not visible: direct link :

https://i.postimg.cc/rmp0DFwK/temp-Image7-LNp-Qf.avif

https://i.postimg.cc/tJZszSPb/temp-Imagep9-LTxp.avif

https://i.postimg.cc/0QH6DRzZ/temp-Imagewvvk-GT.avif

 

[koraks]

It appears that postimg does not allow deeplinking into forum posts. I've copied the images below for convenience's sake:

Note that on Photrio there's no need to upload images to an external site before posting. You can simply copy-paste into a post directly.

 

[mug]

Thanks for posting the photos properly.
And I learnt something for posting the photo's better next time.