Martin Grelle, New Wealth for the Blackfeet, oil, 44 x 52. Estimate: $150,000-$250,000.

Martin Grelle, New Wealth for the Blackfeet, oil, 44 x 52. Estimate: $150,000-$250,000.

Martin Grelle, New Wealth for the Blackfeet, oil, 44 x 52. Estimate: $150,000-$250,000.

Martin Grelle, New Wealth for the Blackfeet, oil, 44 x 52. Estimate: $150,000-$250,000.

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