The Tianjin TY2500 (called ST25 by Sea-Gull) family of movements has automatic winding and is oversized, measuring 30.40 or 37.20 mm in diameter.
| Functions | Jewels | Diameter | Height | Open Heart | |
| TY2501 ST2501 | Small seconds at 9:00 | 25 | 30.40 | 7.40 | With bridge |
| TY2502 ST2502 | Date pointer at 3:00 Day pointer at 9:00 | 29 | 30.40 | 7.40 | With bridge |
| TY2503 ST2503 | Date pointer at 3:00 Day pointer at 9:00 Year and Month at 12:00 | 29 | 30.40 | 7.40 | With bridge |
| TY2504 ST2504 | Retrograde day at 2:30 Retrograde date at 9:30 | 33 | 30.40 | 7.40 | With bridge |
| TY2505 ST2505 | Power reserve at 2:30 Retrograde date at 9:30 | 38 | 30.40 | 7.40 | With bridge |
| TY2509 ST2509 | Power reserve at 12:00 | 34 | 30.40 | 7.40 | With bridge |
| TY2510 ST2510 | Second timezone at 12:00 | 31 | 30.40 | 7.30 | With bridge |
| TY2525 ST2525 | Day pointer at 3:00 Month pointer at 9:00 Big date at 12:00 | 29 | 30.40 | 7.90 | With bridge |
| TY2526 ST2526 | Small seconds at 6:00 Big date at 12:00 | 29 | 30.40 | 7.90 | No |
| TY2527 ST2527 | Month pointer at 4:00 Day pointer at 8:00 Big date at 12:00 | 25 | 30.40 | 7.90 | No |
| TY2528 ST2528 | Small seconds at 6:00 Moon phase at 6:00 Big date at 12:00 | 29 | 30.40 | 7.90 | No |
| TY2529 ST2529 | Day pointer at 3:00 24 hour hand at 6:00 Month pointer at 9:00 Big date at 12:00 | 29 | 30.40 | 7.90 | No |
| TY2530 ST2530 | Date at 3:00 Power reserve at 5:00 Small seconds at 9:00 | 33 | 30.40 | 7.40 | No |
| TY2532 ST2532 | Power reserve at 3:00 Small seconds at 9:00 | 31 | 30.40 | 7.40 | No |
| TY2533 ST2533 | Central 24 hour hand Date at 3:00 Power reserve at 6:00 Small seconds at 9:00 | 31 | 30.40 | 7.40 | No |
| TY2542 ST2542 | Small seconds at 6:00 Power reserve at 12:00 | 34 | 30.40 | 7.40 | No |
| TY2545 ST2545 | Central seconds Hours and minutes at 3:00 Retrograde date at 6:00 Second time zone at 9:00 power reserve at 12:00 | 40 | 30.40 | 7.90 | No |
| TY2552 ST2552 | Month pointer at 3:00 Date at 4:30 24 hour hand at 6:00 Day pointer at 9:00 | 28 | 30.40 | 7.40 | No |
| TY2551 ST2551 | Date at 3:00 Small seconds at 9:00 | 30 | 30.40 | 7.40 | No |
| TY2553 ST2553 | Date at 3:00 | 25 | 37.20 | 7.40 | No |
| TY2557 ST2557 | Central 24 hour hand Date at 3:00 Small seconds at 9:00 | 30 | 30.40 | 7.40 | No |
| TY2561 ST2561 | Date at 3:00 Power reserve at 6:00 | 29 | 37.20 | 7.40 | No |
| TY2563 ST2563 | Central seconds Hours and minutes at 3:00 Big date at 6:00 Second time zone at 9:00 Power reserve at 12:00 | 36 | 37.20 | 8.40 | No |
| ST2571 ST2571 | Date pointer at 12:00 Day/night at 12:00 | 27 | 30.40 | 7.73 | Yes |
| ST2573 | Second timezone at 3:00 Second timezone at 9:00 Retrograde date at 12:00 | Yes | |||
| ST2575 | Big date at 12:00 | Yes | |||
| ST2590 | Perpetual calendar |