6g/Sz9 Sterling Silver Antique Ostby Barton Art Deco Banded Agate Ring
Updated August 23, 2026
This auction ended on September 3, 2026.
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| Lot number | 0108 |
| Estimate | $10 - $325 |
| Opening bid | $10 |
| Category | Jewelry & Watches |
| Auction | Vintage Silver & Native American Jewelry 16 |
| Date | September 3, 2026 at 6:00 PM EDT |
| Auction house | Sphere Auctions LLC |
| Location | Sun Prarie, Wisconsin |
6g Ostby Barton Art Deco Banded Agate Ring Brand/Model: Hallmark “OB STERLING” with a Maltese cross, the mark of Ostby & Barton, the jewelry firm founded by Engelhard Ostby and Nathan Barton.
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