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Brand: | Sea-Gull, Tianjin | 
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|---|---|---|---|
| Family: |
Unknown
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| Height: | |||
| Jewels: | |||
| Reserve: | hours | ||
| Frequency: | |||
| Winding: | Hand winding | ||
| Diameter: | |||
| Seagull ST3621 | Complications: | ||
| Hands: | Central Hour Hand, Central Minute Hand, Small Seconds Hand at 6:00 | ||
| Distinguishing Technical Characteristics | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
 Hand-Winding  Clockwise Balance Cock  Indexed Regulator |
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| Production: – Current | |||||||||||
| 1910s | 1920s | 1930s | 1940s | 1950s | 1960s | 1970s | 1980s | 1990s | 2000s | 2010s | 2020s |
Cal. ST3621, produced by Tianjin Seagull Corporation, is a hand-winding movement with small seconds based on the Peseux 7001. Tianjin added an extremely long index pointer on the main bridge rather than the balance cock.
Images are taken from official publications and are used here for commentary and educational purposes. Copyright is held by the original owner as noted.