| Manufacturer | Seagull |
| Caliber Number | 3600K, ST3600K, ST36K, ST-3600K, ST36 |
| Movement Type | Manual-wind |
| Jewels | 17 |
| Lignes | 16.5”’ |
| Diameter | 36.60mm |
| Height | 4.50mm thick |
| Beats per hour | 21,600 vph |
| Hand Size | 2.0mm / 1.15mm / 0.27mm (needs confirmed) |
| Anti-Shock System | Incabloc |
| Hand-Windable? | Yes |
| Hacking Seconds? | No |
| Functions | Hours, minutes, small seconds at 9:00 |
| Country of Manufacture | China |
| Known Models | Sea-Gull M222SK, Invicta 5001, Invicta 17265, Invicta 1090, Invicta 1088 |
This Seagull caliber 3600K was found in an Invicta watch. This movement is reportedly the same as the Tianjin caliber ST36. Tianjin and Seagull are the same company (Tianjin Seagull Watch Group), but they have offices in Tianjin, China as well as Hong Kong. Apparently the different caliber numbers correspond with where the movements ship out of. You’ll notice no engravings or inscriptions on the movement or rotor. Not even a jewel count.
ST3600 VS ST3600K:
Tianjin Seagull is known for their mechanical manual-wind caliber ST3600 which is an ETA 6497 clone movement. The K at the end of 3600K is essentially the skeletonized version of that movement.
Gold/Silver Tone:
The ST3600K is available in a steel (silver tone) finish and a gold tone finish. As far as we know, Seagull does not distinguish these options with different caliber numbers.
Replacement Prices:
At the time of this post, replacement prices for the Seagull caliber ST3600K were found online in the range of $75.25-88.77 USD.
Video:
Examples of watches with the ST3600K:
The ST3600K pictured below was found in this Invicta 5001.
More watches with the ST3600K:
Additional Resources:
