Glashütte Original · SeaQ

Strap for SeaQ Date Stainless Steel / Black / Synthetic - Folding

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
Reference1-39-11-06-60-35
FamilySeaQ
MovementGlashütte Original caliber 39-11 hours, minutes, seconds | date
Year2024
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 1-39-11-06-60-35

Selected for the 20 mm lug width · workshop selection

All 20 mm straps →

The SeaQ 1-39-11-06-60-35, seen from the bench

The Glashütte Original SeaQ 1-39-11-06-60-35 is a professional diving watch with a 39.50 mm stainless steel case and 20 mm lug width. It features the caliber 39-11 automatic movement visible through a screw-down sapphire caseback, displaying hours, minutes, seconds, and date. Water-resistant to 300 meters (ISO 6425), the watch combines a satin-textured dial with white gold applied indices and luminescent markers. The unidirectional bezel ensures reliable underwater chronometry, embodying Glashütte Original's philosophy of precision and geometric design without compromise.

Frequently asked questions

What is the lug width of the Glashütte Original SeaQ 1-39-11-06-60-35?

The lug width of the SeaQ 1-39-11-06-60-35 is precisely 20 mm. This dimension is standard for this generation and allows the use of any aftermarket strap specifically designed for 20 mm lugs. To verify the measurement, position a digital calliper perpendicular to the inside of the lug, from shoulder to shoulder, obtaining a reading of 20.00 mm ± 0.05 mm.

Which strap is most suitable for the Glashütte Original SeaQ?

The SeaQ expresses itself fully with straps in brushed alligator or shell cordovan in vegetable tanning, which enhance the constructive geometry of the stainless steel case. For frequent diving use, butadiene rubber certified to ISO 6425 offers waterproofing and durability. Pressed calf with pronounced grain represents a versatile compromise between narrative elegance and practicality, allowing transitions between marine and professional contexts without strap changes.

How do I change the strap on the Glashütte Original SeaQ?

The SeaQ uses removable lugs with internal spring bar. Obtain a spring bar tool or similar extractor. Insert the tip into the lateral groove of the lug, press gently to compress the internal spring, and slide the bar horizontally from its seat. Repeat on the opposite side. Installation of new strap: align the strap holes with the lugs, insert the spring bar from one side allowing it to snap into the seat, then repeat from the other side, verifying there are no lateral movements.

Can I use an aftermarket strap compatible with the SeaQ?

Yes. Any strap manufactured for 20 mm lug width is compatible with the SeaQ 1-39-11-06-60-35. We recommend verifying that the spring bars are made of stainless steel or titanium to prevent galvanic corrosion when in contact with the case. For marine-use rubber straps, ensure the material is certified to ISO 6425 for high-salinity environments.

What is the average lifespan of a leather strap for the SeaQ?

A premium quality calf strap, with vegetable tanning and hand-rubbed finishing, maintains structural and aesthetic integrity for 18–24 months of daily use under normal dry conditions. In frequently humid environments (pools, water sports), durability reduces to 12–15 months. Shell cordovan in vegetable tanning extends longevity to 36 months due to superior fibre density. Brushed alligator lasts 24–30 months if not directly exposed to prolonged immersion. Butadiene rubber, if cared for, guarantees 48+ months without noticeable UV degradation.

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.

Request an appointment →

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