Glashütte Original · SeaQ

Strap for SeaQ Date Stainless Steel / Diamond / Blue / Bracelet

Takes 20 mm straps. Verified lug width, the straps that fit this model, and answers to the most common questions.

Lug width20 mm
Case diameter40 mm
Reference1-39-11-09-82-70
FamilySeaQ
MovementGlashütte Original caliber 39-11 Hours, Minutes, Seconds | Date
CaseStainless Steel

Spring bar

Swiss Standard universal spring bars

The right category for this model · 316L steel, all lug widths 13–26 mm

Straps for the SeaQ 1-39-11-09-82-70

Selected for the 20 mm lug width · workshop selection

All 20 mm straps →

The SeaQ 1-39-11-09-82-70, seen from the bench

The SeaQ represents Glashütte Original's interpretation of the sporty dive watch. It features the automatic caliber 39-11 with hour, minute, second and date indications. 20mm lugs complete the technical configuration of the timepiece.

Frequently asked questions

What is the lug width of the Glashütte Original SeaQ 1-39-11-09-82-70?

The lug width of the SeaQ is 20 mm, measured internally between the endpoints of the case lugs. This dimension is critical for selecting compatible straps and ensuring proper fit to the wrist without unwanted lateral movement.

Which type of strap suits the Glashütte Original SeaQ best?

The SeaQ accommodates multiple interpretations. An alligator or vegetable-tanned calf leather emphasises the classicist and racing-inspired aesthetics of the model; a FKM rubber strap is ideal for saline and humid environments; a NATO provides maximum versatility and reversibility. Your choice depends on primary use and personal aesthetic preferences.

How do I change the strap on my SeaQ 1-39-11-09-82-70?

Strap replacement is accomplished by removing the spring bars that traverse the case at the lug zones. Use a dedicated tool (spring bar tool) or a blunt edge; exercise consistent yet delicate downward pressure to extract the bar. Insert the new strap, align the holes, and re-insert the bar until the stop-click engages. Verify proper positioning before wearing the watch.

Can I use a high-quality aftermarket strap on my SeaQ?

Absolutely. Milanostraps.it offers 20mm artisanal straps constructed to quality standards equal to or exceeding factory solutions. The crucial factor is verifying physical compatibility (spring bar diameter 1.8–2.0 mm) and selecting materials that reflect the technical and elegant nature of the SeaQ.

How long does a natural leather strap last on the SeaQ?

A vegetable-tanned leather strap has a mean longevity of 3–5 years with daily use, whilst developing a unique and noble patina during this period. Durability is influenced by solar exposure, humidity, and cleaning frequency. Regular maintenance (annual conditioning with natural wax) significantly extends material lifespan.

The next step

The right strap isn't chosen. It is built, together.

From the atelier appointment to delivery, every step is made for those who know that things done well take time. Rare leathers, one piece at a time, eighteen months of warranty.

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Casati Milano · Via XX Settembre 15, Milan · by appointment only