Made between 1908 and 1917.
The gold mounted egg is covered with a very fine translucent sky blue enamel over a moiré guilloche designs.
Guilloché is a decorative technique in jewelry making, when the surface of an object is mechanically engraved with a repetitive pattern.
The egg is marked with 56 zolotnik old Russian gold standard (14K) on the suspension ring.
Length of the egg without the ring is 16 mm (10/16 in.)
Antique Russian Blue Guilloche Enamel Egg Pendant