Poland silver cross of merit (Krzyż Zasługi).

[johanis1860]

Hello.
I have add in me collection this Poland silver cross of merit (Krzyż Zasługi).
Is pre WW2 made in French of silver,has three marks on the back.
I have have search in the web und found the mark on the right is the silver mark
and in the left the maker mark,the other on over the silver mark can't identify.
Please can someone help me to identify the maker and other mark.
Any infos and comments are welcome.
Thanks.
Merry Christmas.
Best regards,Jannis.