细节
A singing bird box by Rochat
the fusee movement with male key, maker's stamp JFR, No. 634, with four pairs of cams acting in succession, the bird with coloured plumage and moving wings, tail, neck and beak, in tortoiseshell case with gilt stringing inlay, engraved and gilt oval cover and key compartment at back --3 5/8in. (9.2cm.) wide
See Colour Illustration