Charles M. Russell, Buffalo Hunt #27, watercolor, 21 x 29. Estimate: $600,000-$900,000.

Charles M. Russell, Buffalo Hunt #27, watercolor, 21 x 29. Estimate: $600,000-$900,000.

Charles M. Russell, Buffalo Hunt #27, watercolor, 21 x 29. Estimate: $600,000-$900,000.

Charles M. Russell, Buffalo Hunt #27, watercolor, 21 x 29. Estimate: $600,000-$900,000.

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