This exquisite brooch is signed Castlecraft in a long narrow cartouche on the back of the piece although hard to photo. It is a large east to west oval piece all done in highly mill grain worked gold filled metal. Castlecraft and Hill Craft jewelry were made by some of the same people and only gold filled wire and such was used to make the jewelry. This one has a ruffled frame of this wonderful mill grain worked gold tone metal with a recessed center area all filled in with cobalt blue enamel and then a lovely floral design of more mill grain worked gold tone metal. The pin is straight with a safety clasp in good working order. It is 2" long by 1-3/4" wide. It is slightly domed or convex in shape. The brooch is in excellent vintage condition with all enamel intact and really beautiful.