Gold enameled rooster brooch with diamonds

18k yellow and white gold, on a shape of a rooster, embellished by diamonds and decorated with red, blue, and green enamels. 
N. 127 diamonds, round shape, huit-huit cut, approx. 2.50 ct E-F; VS-SI.
Hallmarked "750". Dimensions 5.2 x 4.3 cm. Weight 27.9 g.
Item condition grading: **** good (three diamonds missed).