Mixed-Metal Verdigris Copper Relief Plaque of Koi Pond

This is a large, square sculptural wall relief depicting a serene koi pond scene, likely executed in the mid-to-late 20th century. The piece is constructed from heavy-gauge copper with high-relief repoussé elements. The background features a deeply textured surface treated with a vibrant verdigris (blue-green) chemical patina, simulating moving water. Within the composition, several koi fish are rendered in high relief, showcasing varied finishes including polished silver-toned metal (possibly tin or nickel plating), reddish-brown copper, and golden brass tones to represent different breeds of koi such as Kohaku and Ogon. The flora includes large, raised lotus or lily pads with a matte brownish-olive finish, alongside stylized vertical reeds. The craftsmanship displays high-quality chasing and repoussé techniques, with visible hammering and hand-tooled textures across the surface. Regarding condition, the piece shows a natural aged patina consistent with its material; there are specific areas of darkening on the copper and minor scuffing on the raised surfaces of the fish. Some edge wear is visible on the corners, and a small blue registration mark or tape fragment is visible on the lower right edge. There are no immediately apparent maker's marks or signatures on the face of the work, suggesting a style influenced by Brutalist or Mid-Century Modern metal arts.

My examination of this mixed-metal koi pond relief reveals a high level of craftsmanship consistent with the late 20th-century Brutalist-inspired metalwork movement. The use of multi-tonal patinas and high-relief repouss) indicates a skilled artisan, likely one working in the vein of Curtis Jer) or the C. Jere studio, though the lack of a visible signature suggests it may be a high-quality boutique piece rather than a mass-production work. The contrast between the vibrant verdigris background and the polished metallic koi creates significant visual depth and decorative appeal. The condition is generally good; the minor scuffs on the raised koi surfaces and the natural aging of the copper reflect its age without detracting from the aesthetic. The market for mid-century modern and brutalist decorative arts remains robust, with mixed-metal wall hangings seeing steady demand in interior design circles. Similar anonymous high-quality sculptural plaques typically fetch between $1,500 and $3,000 depending on the gallery setting. However, my assessment is limited by the digital format; I cannot verify the weight, mounting hardware, or back-side signatures that might indicate a specific maker. To fully authenticate this piece, I would require a physical inspection to check for stamps on the rear frame, a chemical analysis of the silver-toned plating to distinguish between nickel and silver, and any provenance documentation or original gallery labels. Without a confirmed signature, the value relies primarily on its decorative impact and technical execution.