Illinois Watch Company Sangamo Special Sangamo Special Model 13 (Sixty Hour)
16s open-face, 23 jewel, extended 60-hour mainspring, final and highest-spec Sangamo Special model
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Specifications
- Case
- gold-filled or solid gold
- Caliber
- 16 size, Model 13
- Movement type
- Manual
- Jewels
- 23
- Power reserve
- 60 h
- Produced
- 1923–1930