I have an extremely similar fork which is marked "BLOOMINGDALE BROS. INC." with "DENMARK" underneath and then it has a similar symbol, although for some reason my symbol is not quite identical to your symbol (Is my symbol just lightly struck?) and then I have a "STERLING" with "MADE IN DENMARK" underneath :::
My pieces are attributed to Bloomingdale Brothers, but I do not know much about the Bloomingdale Brothers :::
I say my pieces are attributed to Bloomingdale Brothers because I saw a few pieces with hallmarks identical to mine in the collection of a well-known flatware dealer who has an unbelievably large collection and he is extremely knowledgable as well ::: However, it is possible that Bloomindale Brothers is just a retailer, because it does sort of look like a hallmark of a retail shop ::: I don't know if I made things more confusing or not, but somehow I think we are on the right track, and sometimes being on the right track is the best you can do :::