This is a beautiful Sterling Silver and Enamel brooch that was most likely worn in the early part of the twentieth century as a Belt Brooch at waist level, or as a Cloak Pin on the shoulder area. It is marked 'Sterling' and has the Maker's marks for The Webster Company which was established in 1879 in Massachusetts, USA, and was in business until 1949. (Ref: Fred Rezazadeh's 'Collectible Silver Jewelry' book). The brooch is quite large, measuring 7cm by 5cm or 2 3/4in. by 2 in. It weighs 28.7 grams. Its condition is almost perfect. I can see one tiny little pinprick hole in the enamel on the edge under strong magnification (too small to photograph). This is a quality piece, of heavy silver, and beautiful thick enamel over an engine turned, or Guilloche design, of blue stripes and white dots, adorned with iridescent pink flowers and leaves on the four sides. I use brooches of this size to secure a large scarf, or 'throw', over my shoulder and they look stunning.