Fabulous Art Deco Platinum, Enamel, and Diamond Clip, probably by William Scheer for Raymond Yard, circa 1930. The clip is designed as an enamel plaque with a flying duck, framed by platinum set bead and channel-set diamond baguettes totaling approximately total 3.50 carats. Height: 1 3/8 inches. Unsigned, but documented in Masterpieces of American Jewelry by Judith Price, p. 66.
Note: An almost identical example depicting a sailfish is pictured in Raymond Yard by Natasha Kuzmanovic, p. 116, image 155.