Quadruple plate silver refers to items that are coated with a 0.012 inch thick layer of silver. These items are made with a more affordable base layer such as copper or nickel and electroplated with an outer layer of silver. They were mostly made in the 19th century.
This small hand mirror (they had small faces back then -🤭) has a nice weight to it. Round mirror on reverse is beveled. Lots of floral etching. It is currently polished but will tarnish with time, so keep that in mind. SEE ALL PHOTOS because they will clearly show you all the flaws. Don't forget to enlarge, too as clear photos are taken here that show details when enlarged...OK, 90% of the time...

This item is sold from an excellent, highly rated vintage boutique in Northfield, OH.