How to remove this movement from the case? (ETA 251.262)

[timenut]

One of my watches has a slight smudge on one of the hands.. and I am trying to get to it in order to clean it.

The watch in question is a Kirium quartz and I have managed to remove the stem from the movement. Now, the problem is.. how do I remove the movement from the case?

Typically, in another similar model, I would twist the movement anti-clockwise until it releases off the notches on the case. However, there aren't any notches on this one.

Here's a photo of the movement before I removed the stem and battery. Any idea on how to proceed?

[zeFiF]

[zeFiF]

[timenut]

Thanks zeFiF. Appreciate it. :)

Got it opened and fixed the smudge. Making sure it's totally dust free when putting it back together was a real pain though.

[pithy]

Welcome to the party zeFiF. Our new participant is a regular in the watchmaking forum at French language FAM (Forum A Montres).

p

[TISSOT PRX]

Which kirium is this ? Do u know the model number ??