| Manufacturer | Tianjin Sea-Gull |
| Caliber Number | ST1731, ST-1731, TY2718, TY-2718 |
| Base Caliber | Seagull ST1701 (ST17 series) |
| Movement Type | Automatic, self-winding mechanical |
| Lignes | 11.5”’ |
| Diameter | 26mm |
| Height | 5.12mm |
| Jewel Count | 20 |
| Beat Rate / Frequency | 21,600 bph / 3 Hz |
| Lift Angle | Unconfirmed |
| Power Reserve | ~38 hours |
| Hand-Windable? | Yes |
| Anti-Shock Device | Incabloc style |
| Regulator | Index style |
| Hand Count | 3 |
| Functions | Central hours; central minutes; small seconds subdial at 6:00; date at 3:00 or 6:00 |
| Hacking Seconds? | No |
| Country of Manufacture | Made in China |
| Known Models | Baltany Retro WW2 Military Watch, Adee Kaye Vintage Mechanical Collection (Add your watch to the comments below…) |
The Seagull caliber ST1731 / TY2718 is an automatic watch movement with a small seconds complication. This caliber is part of Sea-Gull’s ST17/TY27 family of movements.
As with most made in China movements, the ST1731 is not signed with a brand name, jewel count, or country of origin. In some instances, you may see a rotor signed “Have Jewels”, to indicate that the movement has jewels, but just no number of how many.
ST1731 (TY2718) VS ST1701 (TY2706):
The ST1731 is based on the Seagull caliber ST1701 aka TY2706, with the main difference being that the ST1701 is a no-date and the ST1731 has a datewheel.
Video – Rodina ST1701 and ST1731 Comparison:
Additional Resources:
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