German Renaissance 800 silver wine bottle coaster, ca 1890. Round and deep well. Central rondel (vacant) in engine-turned frame radiating leaf and scroll ornament on lined ground. Wide and flat rim with embossed curvilinear scrollwork and ovals (vacant) between beaded borders. Fully marked including maker's (Koch & Bergfeld) and retailer's (Gebrüder Friedländer) stamps. 

Dimensions: H 1/4 x D 6 1/2 in. Well diameter: 4 in. Weight: 3.5 troy ounces.