Antique Victorian rose gold fronted seed pearl brass filigree lace pin/brooch

Lovely Victorian lace pin type brooch that appears to have been made from fine brass filigree with a centre star shape to the front that is rose gold cased and set with a small seed pearl to the centre.
In very good antique condition. Pin at the back is in good working order and fastens with a simple C clasp.
Measures 23 mm in diameter. S tamped to the back 'FIX' if that means anything to anyone?
Box is for display only and not included in the listing.