Mixed metal domed decorative objects

The provided image displays a set of four circular, domed objects resting on dark fabric. Each piece features a distinct two-tone metal construction combining brassy-yellow and coppery-orange metallic tones joined together in irregular, interlocking wavy patterns reminiscent of puzzle pieces or stylized geological contours. The items are convex in shape, displaying smooth yet varied surface textures with light reflective highlights, indicating polished or finished metal sheeting. There are notable signs of oxidation, tarnish, and surface patina, particularly around the seams and lower portions of the objects, suggesting age or environmental exposure. No visible maker's marks, stamps, or signatures are immediately apparent from the angle provided. The identification of these items remains strictly unverified, as they bear stylistic similarities to mid-century modern decorative hardware, architectural appliques, or artistic copper and brass coasters, but lack explicit documentation or markings to confirm their exact manufacturing origin, period, or intended function. The overall craftsmanship suggests hand-cut or custom-fitted metalwork due to the organic variations in the interlocking seams.

Based on what I can see in the photograph, this set of four circular, domed objects displays a striking two-tone construction of brassy-yellow and coppery-orange metals joined by irregular, interlocking wavy patterns. The convex forms feature smooth surfaces with visible signs of oxidation, tarnish, and surface patina, particularly around the seams. I cannot verify from a photo the exact alloy composition, manufacturing technique, or exact period, as the items bear stylistic similarities to mid-century modern decorative hardware or artistic coasters but lack explicit documentation or maker's marks. My value estimate of $300 to $500 assumes the hypothesis that these are mid-century artisan-crafted decorative metalworks in good vintage condition. General market demand for distinctive mid-century decorative metal objects remains steady among collectors of period design, though unverified studio pieces without clear provenance trade at a more accessible level. To properly assess and confirm authenticity, I would need physical inspection to check for hidden hallmarks, evaluate the depth of the patina, and analyze the metal sheeting. If further evaluation reveals the items are later reproductions, decorative copies, or 'in the style of' rather than period pieces, the market value would likely decrease to the $75 to $150 range.