A pair of enamel, pearl and diamond earrings, early 20th century and later, each of navette-shaped

A pair of enamel, pearl and diamond earrings, early 20th century and later, each of navette-shaped outline, each applied with green guilloché and white enamel, centred on a half pearl within a heart-shaped border of rose-cut diamonds, to an outer border of seed pearls, mounted in gold, length 2.5cm each, later screw fittings, pearls untested