Antique Car Key Chain Unique artisan sterling silver car key chain. The key chain is shaped as a detailed antique car. It was made in the electroforming method. A great gift to a friend or yourself. Measurements : Marks : Length: 5.2in. / 13.2cm. Width: 0.9in. / 2.28cm. 1 inch = 2.54cm 925 for Sterling Silver. Weight : 25.3gr. / 0.81oz.