Which cases does this bracelet fit?

It fits the Lucius Atelier case range — every Ultra Thin Edition case except the Bauhaus 33 (18mm lugs) and the Seiko-Dweller 36mm (9mm lugs, and it ships with its own integrated bracelet), plus our classic-range cases (Datejust, Explorer, GS, GS Diver, and our SKX013 family). The end-links are shaped to seat against our case profiles. See the linked compatibility grid on the product page for the full list.

Will it fit a standard Seiko or a generic 20mm case?

No. Unlike a strap or NATO — which fit any 20mm lug — our bracelets use solid end-links shaped to our case profiles. That precise fit is what makes them look built-in rather than bolted-on, but it means they won't fit OEM Seiko cases or generic 20mm lugs. They're made for Lucius Atelier cases only.

How do I resize the bracelet?

The links are joined by screw-type pins. Use a small precision screwdriver (not included) to back out the screws and remove links evenly from both sides of the clasp until it fits, then refit the screws. On clasps with micro-adjustment, set your base size by links first, then fine-tune at the clasp. Take care not to lose the tiny screws.

My bracelet feels loose or a screw backed out — is that normal?

On a new bracelet, yes — the link screws ship slightly loose so you can resize easily. Before wearing, tighten every link screw fully with a small screwdriver. A tiny drop of threadlocker on each is optional but recommended — it stops them working loose over time. Once tightened, the bracelet is solid.

Are spring bars included?

Yes — two spring bars come with every bracelet, ready to fit it to your case. No tools are included, so you'll need a spring-bar tool (or a small flat driver) to fit them.

What's the lug width and taper?

All our bracelets are 20mm at the lugs. From there they taper to either 16mm or 18mm at the clasp, depending on the model — the 20/16 taper is slimmer and dressier, the 20/18 stays a touch more substantial. The taper is listed on every product page and in the collection comparison table.

What are the bracelets made of?

Most are solid 316L stainless steel. The Settimo Yellow Gold adds a hard PVD gold coating; the DLC Oyster a Diamond-Like Carbon coating; and the Seikonaut Titanium is machined from Grade 4 titanium (with a 316L steel clasp and screws for thread durability). Each model's material is listed on its product page.

What clasp types are there, and what's the difference?

Three, and they differ in how you fine-tune the fit.| Clasp | Adjustment | Found on ||---|---|---|| **Butterfly deployant** | none — opens from the centre, sits flush | dress and sculpted bracelets || **Rolex-style** | five hidden micro-adjustments, no links removed | the 20/18 Oysters || **On-the-fly** | toolless, adjust on the wrist in seconds | Oyster 20/16 Brushed |

How do the bracelet styles differ?

| Style | What it is ||---|---|| **Oyster** | rugged three-link sports || **Jubilee** | supple five-link (since 1945) || **President** | refined three-piece (since 1956) || **Grand Seiko-style** | clean, refined links || **Settimo** | seven-link, maximum articulation and light || **Seikonaut** | sculpted, original design |Pick by the look you want — the fit is the same across the range.

Should I pick the 20/16 or 20/18 taper?

Mostly preference. A 20/16 taper narrows more toward the clasp for a slimmer, dressier line — it's our main lineup. A 20/18 keeps more width through to the clasp for a sportier, more substantial feel — currently on select Oysters. Both share the same 20mm lug fit; pick by the look you want on your build.

Can I wear it in water?

The bracelet itself is fine — solid stainless steel or titanium, both corrosion-resistant. Rinse with fresh water after swimming in salt water or chlorine, and dry it occasionally. Just note: a bracelet doesn't affect your watch's water resistance — that's determined by the case, crystal, and gaskets, not the bracelet.

Bracelets

Bracelets engineered for your case — not adapted to it. Every bracelet in this collection is built for the Lucius Atelier case range. The end-links are shaped to seat against our case profiles, so a bracelet here fits your build cleanly — not approximately, the way a generic 20mm bracelet never will.

Beyond that shared fit, it is all choice. Solid 316L stainless steel or featherweight Grade 4 titanium; a 20mm taper down to 16mm or 18mm; a heritage silhouette — Oyster, Jubilee, President, Grand Seiko, Settimo, or the sculpted Seikonaut; and your clasp, from a classic butterfly deployant to our new toolless on-the-fly micro-adjust. Every one resizes at home with a screwdriver.

Which bracelet is right for you?

Want a rugged sports bracelet? Oyster — mid-polished, DLC black, or the new fully-brushed 20/16.
Want toolless, on-the-fly fit? The new Oyster 20/16 [Brushed] — nine micro-adjustments you shift by hand, no tools.
Dressing up? Jubilee (five-link, 1945) or President (three-piece, 1956).
Want a clean, sculpted look? Grand Seiko or the Seikonaut.
Want maximum articulation and light? Settimo — seven links, in steel or PVD yellow gold.
Want the lightest on the wrist? Seikonaut Titanium — Grade 4 titanium, around 45g.

The lineup at a glance

Bracelet	Taper	Clasp	Material
Oyster [Brushed] · NEW	20/16	On-the-fly	Steel
Oyster [Mid-Polished]	20/18	Micro-adjust	Steel
Oyster [DLC Black]	20/18	Micro-adjust	Steel · DLC
Jubilee	20/16	Butterfly	Steel
President	20/16	Butterfly	Steel
GS	20/16	Butterfly	Steel
Settimo — Silver	20/16	Butterfly	Steel
Settimo — Yellow Gold	20/16	Butterfly	Steel · PVD gold
Seikonaut	20/16	Butterfly	Steel
Seikonaut — Titanium	20/16	Butterfly	Titanium

Every bracelet uses a 20mm lug width and includes two spring bars. Bracelets are built for Lucius Atelier cases — a generic 20mm bracelet will not fit our case profiles. Link counts and exact dimensions vary by model; see each product page.

Materials, clasps, and sizing

Materials. Most bracelets are solid 316L stainless steel. The Settimo Yellow Gold adds a hard PVD gold coating; the DLC Oyster a Diamond-Like Carbon coating several times harder than bare steel; and the Seikonaut Titanium is machined from Grade 4 titanium (with a steel clasp and screws) for roughly 30% less weight.

Clasps. Three types across the range: a butterfly deployant that opens from the centre (the dress and sculpted bracelets); a Rolex-style clasp with five hidden micro-adjustments on the 20/18 Oysters; and a new toolless on-the-fly clasp with nine micro-adjustments on the 20/16 Oyster [Brushed].

Sizing. Every bracelet uses screw-type link pins — remove links evenly from both sides with a small screwdriver, then fine-tune at the clasp where the model allows. Link screws ship slightly loose for easy sizing; tighten them fully (a drop of threadlocker helps) before wear.

Whichever you choose, it is built for your case — and sized to your wrist at home.