| Production: – | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| 1910s | 1920s | 1930s | 1940s | 1950s | 1960s | 1970s | 1980s | 1990s | 2000s | 2010s | 2020s |
Tianjin Watch Company makes a family of tonneau-shaped movements known as TY600, or ST68 when sold by Sea-Gull.
| Complications | Jewels | Dimensions | Height | |
| TY603 ST6811 | Open heart 24 hour hand at 12:00 | 23 | 20×26 | 6.88 |
| TY604 ST6821 | Open heart Big date at 12:00 | 23 | 20×26 | 7.00 |
| TY605 ST6851 | Open heart Hour and minutes above center | 23 | 20×26 | 6.76 |
| TY606 ST6861 | Open heart Date pointer at 2:00 24 hour hand at 10:00 Day/night at 10:00 | 23 | 20×26 | 7.03 |
| TY608 ST6880 | Open heart Hand-winding | 20 | 20×26 | 4.09 |
| TY608A ST6881 | Open heart | 20 | 20×26 | 6.03 |
| TY608SK ST6880K | Skeletonized Hand-winding | 20 | 20×26 | 4.09 |
Unknown