This is a lovely pale blue enameled dragonfly brooch, marked 'Sterling silver' and signed J A & S for the maker J. Aitkin & Sons of Birmingham, England. The brooch has a standard pin stem and old fashioned C clasp.
The brooch measures 2" x 1.5". It weighs 5.9 gr.
Condition: There is some small enamel loss in the center where the wings attach to the body.
Dragonflies became very popular decorative motifs during the Art Nouveau period.