Portable brass tapestery or needlework bracket

Portable brass tapestry or needlework bracket Heavy cast brass with G-clamp for attaching to say a shelf or mantelpiece. Three folding arms to adjustable bar with rings for
suspending a banner or needlework.
English, circa 1850 - 1890
Bar Width 24” (61cm) Folding Arm each extend 6” (15cm)