Shotshell ID please

Can anybody help me with the following headstamps??

I think most speak for themselves, but the one without headstamp looks strange to me.
Steel base but only the base!
when it goes into the paper it is not magnetic anymore.
No sign of headstamp or printing on the case.

many regards rené

Cal 20 C* Paris… Maybe Gevelot - France

That was also my thought, but like to get some proof!

Regards rené

20 G* 20 Paris… SFM 100% sure

Hi JP.

Thanks for the info.
Do you have any idea on the others?

Many Regards rené