American Bamboo Turned 'Birdcage' Windsor Armchair - An American Bamboo Turned 'Birdcage' Windsor Armchair, First Quarter 19th Century. Mixed wood, seven-spindle back over a scooped seat, the legs joined by four stretchers. Dimensions: Height 34 3/4in; width 18in; depth of seat 15 1/4in; seat height 18 1/4in. Provenance: Property from a Philadelphia Main Line Collection. Condition: Structurally sound. Retaining an old worn surface. Wear to armrests, legs and stretchers, otherwise good condition.