Roy Andersen, High Plains Thunder, oil, 40 x 48. Estimate: $50,000-$75,000.

Roy Andersen, High Plains Thunder, oil, 40 x 48. Estimate: $50,000-$75,000.

Roy Andersen, High Plains Thunder, oil, 40 x 48. Estimate: $50,000-$75,000.

Roy Andersen, High Plains Thunder, oil, 40 x 48. Estimate: $50,000-$75,000.

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