1931 Butte Coal Company Montana Calendar
Updated August 7, 2026
| Lot number | 706 |
| Estimate | 150.00 - 200.00 USD |
| Auction | The Richest Hill on Earth - Day 1 |
| Date | August 13, 2026 at 9:59 PM MDT |
| Auction house | Davis Brothers Auction |
| Location | Missoula, Montana |
9 7/8" by 16". Olaf Seltzer Artwork. Roundup Bucking Broncho Coal.
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