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This five-link steel bracelet is only compatible with Seiko Small MM Automatic Mechanical Diving Watches: SBDC031/033, SZSC004, SPB101, SPB103, SPB427, 321, 323, 325 series.
This is an aftermarket strap, not original. Original straps are not available in this five-link style, please read carefully.

⚠️ Important: This strap only works with genuine watches. It fits original watch cases, but does NOT fit counterfeit cases. It also does not work with Small MM solar watches — please do not purchase if you own these models.

Strap specifications: 20*18mm, link thickness 3.8mm.
Clasp width: 18mm, uses 2.5mm thick spring bars.
Links use a pin-type structure. You need a link removal tool to disassemble them.

We offer two clasp options:
- Standard clasp (without safety lock): perfect for everyday use if you don't dive often
Diver's clasp with safety lock

Please do not purchase if you have high-end quality expectations. This is a 300 yuan item, so please do not expect the quality of a 600 yuan strap.

If you need a strap for SBDC001/003/005, please send us a message. These three models have different hole positions and require custom adjustments. Thank you!

The watch case shown in the pictures is for fitting demonstration only and is not for sale. Only the steel strap will be shipped to you.