Signed Intaglio Etched Crystal Art Glass Paperweight

This is a high-quality, clear lead crystal art glass paperweight or sculpture featuring an intricate intaglio (reverse) etching of a bird, likely a pheasant or similar game bird, perched amidst foliage. The piece is constructed from heavy, solid glass with a rounded or ovate form that allows light to refract through the etching, creating a three-dimensional effect. The artwork is characterized by fine, textured details in the羽 feathers and grass, suggesting professional sandblasting or wheel-engraved techniques. A notable feature is the handwritten diamond-point signature on the lower left side, which identifies the artist or manufacturer, appearing to be 'Kosta' or a similar studio glass mark from northern Europe. The glass shows excellent clarity with a subtle bluish-violet tint typical of high-end lead crystal. Condition appears excellent with no visible chips or deep scratches in the provided view, though some minor surface shelf wear on the base is expected. This style is consistent with Scandinavian mid-to-late 20th-century glasswork, such as that produced by Orrefors or Kosta Boda. The craftsmanship is evidenced by the depth of the carving and the way it utilizes the internal optics of the glass to animate the subject matter.