Help with hallmarking, please?

Hi everyone. I’m new here and I hope someone will be able to help me with this brooch.
I bought it of Ebay. The only thing I know from hallmarking is, it’s sterling silver. Can anyone help with the rest of the marks, please? The marks on the left, I’m guessing, are standing for" JS" , but I may be wrong.
Thank for any clues
brooch.jpg
hallmark.jpg

Hi there,
My opinion, and that’s all it is, is that the marks are for Poland the W925 is Warsaw and it’s post 1986. The mark to the right, head facing right, is also consistent with Poland post 1963. Can’t offer any help with the other mark I’m afraid
Hope this helps,
Tony