I'm trying to find out the maker and the Assay office.
If anybody can identify the maker's mark and/or let me know what the piece is, I would greatly appreciate it.
I know the lion indicates .833 purity, and the R is 1927. I don't know which Assay office B (in Minerva's helmet) refers to either.
The marks:
"B" under 2 stars inside a shield
Lion Passant
R
Minerva with B in the helmet


