Anyone know this mark: B.W ?

Hi
B.W in a rectangular lozenge. i can get close, but no cigar.

Can anyone ID it?

Thanks for looking.
B.W .JPG

Update:

For what it’s worth, i happened to be studying the piece again, which i had thought was silver plate due to this maker mark being the only ID, but i believe now that it is solid silver and likely sterling.