I´ll try ... and will check cylinder in my gun.

I have heard, there are 2 kinds of cylinder stars. One elder type, and one newer. This I have cleared: I have the elder one ( seems from Manurhin - arsenal made ) and the cylinder in question, too. Looks like 6 pentagons.

The new kind of "star" on the cylinder back seems to be with the Chapuis made guns. Seems more like a star.

Thanks, Hermann