9 ct gold necklace with set pearls

by Becks
(New Zealand)

I have acquired a very lovely vintage necklace from a recently passed relation. It has a leaf (maple?) With 5 pearls set in claws. The back embossing is s.bro and 9ct. I do not know if pearls are natural or not. Or if they are pearls at all. I would just love to have feedback on this piece - age, origins etc. Thank you.