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Brand: | Sea-Gull, Tianjin | 
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|---|---|---|---|
| Family: |
Unknown
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| Height: | 4.50 mm | ||
| Jewels: | 17 | ||
| Reserve: | 46, 50 hours | ||
| Frequency: | 21,600 A/h | ||
| Winding: | Hand winding | ||
| Diameter: | 37.20 mm | ||
| Complications: | |||
| Hands: | Central Hour Hand, Central Minute Hand, Lépine Small Seconds Hand | ||
| Distinguishing Technical Characteristics | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
 Hand-Winding  Clockwise Balance Cock  Indexed Regulator |
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| Production: 2005 – Current | |||||||||||
| 1910s | 1920s | 1930s | 1940s | 1950s | 1960s | 1970s | 1980s | 1990s | 2000s | 2010s | 2020s |
Cal. ST3600, produced by Tianjin Seagull Corporation, is a hand-winding movement with Lépine small seconds (at 9:00) similar to the Unitas 6497. It features a classic bridge design and finishing on the back side.
Images are taken from official publications and are used here for commentary and educational purposes. Copyright is held by the original owner as noted.