A German silver singing bird automaton music box

Fourth-quarter 19th Century
Marked to base with unidentified bird mark
The rectangular-form bird-box with silver case chased with avian motifs and scrolling acanthus, the top centering an oval hinged lid with repousse putto revealing a reticulated grill with singing feathered automaton bird, with bird-form activation switch
1.875" H x 3.875" W x 2.875" D
Condition Report: Overall good condition with tarnishing and light scratches commensurate with age. Bird with wear and darkening to feathers. Includes winding key.