Unknown Very Detailed Sterling Teapot and sugar and creamer

Hi all. I came across this set and can only make out part of the hallmark. on the left is a cursive B and on the right is a cursive S. in the middle is something in a circular shape but its too faded to make out…hoping some one recognizes it. i just pictured the sugar container. these pieces are huge and heavy. the one shown is 25 troy. are they worth anything besides melt? and does any one know the hallmark?