
Hopefully you can see how the artwork is gold and silver.
Detail of ornate bit:

Reverse (smooth back):

Minerva (post 1838 is my guess) stamp (Minerva inside cartouche) on right side of "bowl" area:

Unidentifiable diamond-shaped stamp on left side of "bowl" area:

Anyone ever seen one like this? I couldn't even begin to describe it online. Thanks.
Polly