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Brand: | Sea-Gull, Tianjin | 
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| Family: |
Unknown
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| Height: | 5.25 mm | ||
| Jewels: | 20 | ||
| Reserve: | 40 hours | ||
| Frequency: | 21600 A/h | ||
| Winding: | Automatic | ||
| Diameter: | 26.00 mm ( ligne) | ||
| Complications: | Regulator | ||
| Hands: | Central Minute Hand, Hour Hand at 12:00, Small Seconds Hand at 6:00 | ||
| Production: – Current | |||||||||||
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| 1910s | 1920s | 1930s | 1940s | 1950s | 1960s | 1970s | 1980s | 1990s | 2000s | 2010s | 2020s |
Cal. ST17F (also called ST1711 and TY2708) is a regulator movement from Tianjin Seagull of China. It features a 12 hour subdial at 12:00, small seconds at 6:00, and central minute hand.
Images are taken from official publications and are used here for commentary and educational purposes. Copyright is held by the original owner as noted.