Exquisite early century brooches are curved ovals with and etched silver borders with inside circles of pure white guilloche enamel. As you can see, one brooch has a crack in the enamel, but there are enamel pens you could use and well these are old and show only that wear. Both are c clasps and the clasps marked EIFCo. I am not sure about silver content. Click photos for other views. SIZE: 1 is 1 1/2 x 1 5/8"; the other 1 3/4 x 1 5/8"