Precious box with singing bird in gilded silver case, decorated with chased pattern, multicoloured gold, diamonds and pearls. The top panel surface is decorated with yellow gold volumetric floral ornament and engraved red gold plates with platinum pins. An oval hinged lid on the top panel is framed with red gold pattern and elements comprised of grain pearls. The box external surface is decorated with the chased floral composition with diamonds on dark blue and black enamel background. The lid inner surface is mirror-polished. The case lateral panels are guilloched with the elements of the Moresque ornament. The bottom is decorated with the broad guilloched field framed by rosettes. The  keyhole for the movement winding is in one of the rosettes. A compartment for snuff tobacco with the hinged lid is in the rear panel. Vertical ribs are ornated with the ropes of papyrus stems. Sliding onlay with the lever for winding the bird is on the box front side. The oval lid opens automatically during the operation of the movement and a tiny bird in painted feathers appears. It spins, flaps its wings and tail, turns the head, opens and closes the beak; the musical movement imitates bird's chirping. On completion of the movement's work the bird hides and the lid descends. The bird's movement is spring driven, with a fusee – system of stabilization. Key with round grip and cylindrical bar with a square cross-section aperture.

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