Bath Pop Up Overflow Cover with no screws removal

[Mbath]

I have a pop up waste overflow on my bath and the cover has no Grub screw hole so not clear how it can be removed looked at a number of on line forums and have not found any answers.
I think it must ‘pop on’ somehow but dont want to risk breaking it with brute force trying to take it off.

Any ideas anyone?

Thanks

 

[cross thread]

Just unscrew it

 

[Mbath]

Is there a way of checking if it unscrews versus pop on ? Cannot see make anywhere. Thanks

 

[ianmcd]

post a pic of it, somone will recognise it