| Brand: | Sea-Gull, Tianjin | 
|
|---|---|---|
| Family: |
Unknown
|
|
| Height: | mm | |
| Jewels: | ||
| Reserve: | hours | |
| Frequency: | A/h | |
| Winding: | Hand winding | |
| Diameter: | mm ( ligne) | |
| Complications: | ||
| Hands: | Central Hour Hand, Central Minute Hand, Small Seconds Hand at 6:00 | |
| 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 a long pointer to indicate “SLOW” or “FAST”.