This is a gold-tone ornate 925 silver key pendant suspended from a matching beaded ball chain necklace. 6G in total weight.

Because the necklace in your photo has a distinct brassy or golden color, the presence of a "925" stamp usually points to one of two possibilities:

• Sterling Silver base with Gold Plating: The jewelry is crafted from solid sterling silver but has been plated with a layer of gold (commonly known as vermeil).

• Tarnished Silver: The silver base has developed a yellowish or golden-brown tarnish over time due to exposure to air, moisture, or skin oils.

$25 to $65 is the typical retail price for an unbranded vintage sterling silver key pendant on marketplaces like Etsy or eBay. For instance, highly comparable Victorian-revival key charms and ornate Unoaerre / Gori & Zucchi Italy Key Necklaces list right within this spectrum.