Fabulous vintage sterling bracelet decorated in guilloche enamel. I especially love the diagonal stripes of vivid green enamel on each link, alternating with horizontal blue stripes on the connectors for a wonderful ribbon-like look with Art Deco flair. Foldover clasp has three marks -- I can only read the bottom one, which is 925. I haven't found another bracelet in this exact enamel pattern but similar ones online are attributed to unnamed Italian makers.
In any case, it is amazing and in nice vintage condition with just a few small dings in the green enamel on the end link, and overall tarnish. 7/8" wide and about 7 1/2" long, and it weighs 49 grams on my scale.