Help with this silver plate mark please

Can someone please help with the maker of this silver plated flatware as I have never seen a mark like it and if possible maybe a rough date

Thanks for your help Martin

I don’t recognize the mark but perhaps this page can be of some help: https://www.sterlingflatwarefashions.com/SPPatterns/11SPP1A.html.

Good luck!

Thanks for your help Jeff I will take a look