Mixed-media sculpture of an oil derrick in the manner of Randall Hart

This mixed-media sculpture depicts an oil-industry scene, featuring a stylized pumpjack or oil derrick and associated machinery mounted on a heavy, rectangular base. The base appears to be made of a natural material, possibly petrified wood or a similar dense stone, with visible grain and earth-toned coloration ranging from pale tan to deep brown. The sculptural elements are constructed from metal, likely copper and brass, showing a significant aged patina and visible oxidation. Small details include wire-formed plants or shrubs and two cylindrical metal towers. On the lower right corner of the base, the object bears a handwritten-style signature that appears to read 'Randall Hart'. This mark is stylistically consistent with works attributed to Randall Hart, a Northwest artist known for copper-and-stone industrial miniatures produced in the late 20th century. The piece shows signs of age, including dust in the crevices and darkening of the metal solder points. The craftsmanship is folk-art in style, utilizing soldered wire and cut sheet metal to create a three-dimensional industrial vignette. This identification is based on the visible signature and the specific combination of materials, as no certificates of authenticity are present in the image.

This mixed-media sculpture, based on visual analysis, appears to be an industrial-themed miniature featuring a pumpjack design on a stone or petrified wood base. The piece bears a signature consistent with the works of Randall Hart, a Pacific Northwest artist known for these specific metal-on-stone compositions. While the construction techniques and materials appear to align with documented examples of his work, I cannot provide a conclusive identification through a photo alone. The value of $150 to $350 assumes the identification is accurate, reflecting the typical secondary market demand for mid-to-late 20th-century industrial folk art. Based on what I can see, the metalwork shows a significant patina and the base appears to be a natural mineral specimen; however, I cannot verify the integrity of the solder joints or the exact composition of the metal without a physical inspection. The market for Hart-style miniatures is relatively niche, generally appealing to collectors of industrial history or regional folk art. This value estimate is contingent upon the signature being an actual mark of the artist; an unauthenticated piece or a modern 'in the style of' work would likely have a significantly lower value, perhaps in the $40 to $75 range as a decorative object. To move beyond this working hypothesis, a physical examination by an expert in Northwest regional art would be necessary, along with any available provenance or historical documentation. Scientific analysis of the metal alloy and mineral base could also assist in determining the age and origin of the sculpture more accurately than a visual assessment allows.