SEIKO BRACELET & CLASP CODES

Seiko bracelet codes

Seiko bracelet clasps commonly feature the Seiko name or logo stamped or engraved on the outer surface. Many Seiko clasps also include a small alphanumeric code on the underside that can sometimes be cross-referenced with bracelet part numbers. The clasp style and finishing can vary significantly depending on the watch line, with entry-level models often featuring folded steel clasps and higher-end models using solid milled clasps with more refined finishing.

Vintage Seiko bracelets and clasps may carry different markings than modern ones, and some aftermarket replacement bracelets may closely mimic original Seiko clasp designs. Collectors often examine the overall build quality, the consistency of markings, and the fit of the bracelet to the case as additional indicators of originality. However, clasps and bracelets are among the most commonly replaced components, so their presence alone is generally not considered definitive proof of a watch's authenticity.

#01

What to Look For

Seiko bracelets and clasps often carry model numbers, material codes, and date stamps. Check the inside of the clasp, the end links, and the underside of individual links. Codes may be engraved, stamped, or laser-etched depending on the era and model.

#02

Understanding the Codes

Bracelet codes serve several purposes: they identify the specific bracelet model for ordering replacements, indicate the material composition (stainless steel, titanium, gold, etc.), and sometimes include a date code that reveals when the bracelet was made. This date may differ from the watch head production date if the bracelet was replaced or if the brand manufactured components at different times.

More Seiko Guides

Serial Number Guide Case Back Markings Production Years Identify Your Watch

Related Markings

Serial Number Engraving

A unique alphanumeric code engraved on the case back that identifies your individual watch. This number is typically used for warranty registration, service history, and authentication.

Model Number Stamp

An alphanumeric code stamped on the case back that identifies the specific watch model or product line. This number is essential for ordering replacement parts and identifying your watch's specifications.

Water Resistance Rating (Case Back)

A marking indicating the watch's tested water resistance depth, typically shown in meters, feet, bar, or ATM. This rating describes laboratory test conditions, not actual diving depth recommendations.

Case Material Marking

An engraving or stamp indicating the material the watch case is made from, such as stainless steel, titanium, or gold. This marking helps verify authenticity and informs care and maintenance decisions.

Crystal Press Back Symbol

A small symbol on the case back indicating it should be opened with a crystal press tool rather than unscrewed. This marking guides watchmakers on the correct method for case back removal.

Japan Movement Stamp

A case back marking indicating the watch uses a movement manufactured in Japan. This is commonly seen as "JAPAN MOVT" or "JAPAN MOVEMENT" and denotes the origin of the caliber inside.

Frequently asked questions

Where are the codes on a Seiko bracelet?

Bracelet codes are commonly found on the clasp (fold-over or push-button), on the inside of end links where the bracelet connects to the case, or stamped on the underside of individual links. You may need to remove the bracelet to see all markings.

What do the letters and numbers on the clasp mean?

Clasp codes typically indicate the bracelet model number, the material type, and sometimes a date code showing when the bracelet was manufactured. These help identify replacement parts and verify that the bracelet is original to the watch.