A Collection of Robert M. Shipley Jr. Gem Instruments The Gem Refractometer with Original Box and
Updated August 29, 2026
| Lot number | 0187 |
| Estimate | $5 - $1,000 |
| Opening bid | $5 |
| Auction | September Watch & Clock Auction |
| Date | September 24, 2026 at 6:00 PM EDT |
| Auction house | Palmer's Auction Co |
| Location | Campbell, New York |
This collection includes The Gem Refractometer, a precision optical instrument manufactured by Gem Instruments and designed by Robert M. Shipley, Jr. The set comprises the gray-painted alloy
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