Glashütte Original · Senator

Strap for Senator Panorama Date Moonphase Stainless Steel / Blue / Alligator / 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
Reference100-04-05-12-30
FamilySenator
MovementGlashütte Original caliber 100-04 Hours, Minutes, Seconds | Big Date | Moonphase
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 Senator 100-04-05-12-30

Selected for the 20 mm lug width · workshop selection

All 20 mm straps →

The Senator 100-04-05-12-30, seen from the bench

The Senator represents one of the classic lines of Glashütte Original, characterized by the traditional complications of German watchmaking. The model is equipped with the manufacture caliber 100-04 with hour, minute, second, large date and moon phase indication. The reference 100-04-05-12-30 features the typical Glashütte finishes with a clean and legible dial.

Frequently asked questions

What is the lug width of the Glashütte Original Senator 100-04-05-12-30?

The lug width of the Senator 100-04-05-12-30 is 20mm. This dimension, measured from the inner wall of one lug to the other, ensures compatibility with standard artisanal straps and allows for a wide selection of materials and finishes without constructive compromises.

What is the best strap for the Glashütte Original Senator 100-04-05-12-30?

The choice depends on intended use. For maximum aesthetic coherence with Saxon heritage, a vegetable-tanned alligator in medium brown amplifies the purity of the dial. For elegant daily wear, black polished calfskin with a stainless steel deployante is unmatched. For versatility and expressiveness, a dark blue NATO guarantees freedom without compromising the dress watch's identity.

How do I change the strap on a Glashütte Original Senator?

The strap is replaced using a spring bar tool to compress the springs that attach the strap to the lugs. Gently lift the spring with the tool, extract the old strap, insert the new one by aligning it perfectly with the attachments (without forcing), and release the spring. Verify that the strap adheres uniformly without lateral play. With a standard 20mm lug width, assembly is straightforward and requires no intermediaries.

Can I mount a compatible aftermarket strap on the Senator 100-04-05-12-30?

Yes, absolutely. The standard 20mm lug width allows you to mount any artisanal strap certified for this dimension. Milano Straps offers a complete range of straps in alligator, calfskin, shell cordovan, NATO, and rubber—all compatible with the Senator and available for dispatch or online customisation.

How long does a natural leather strap last on a Glashütte Original Senator?

Durability depends on material and maintenance. A quality artisanal vegetable-tanned alligator resists 5–7 years with moderate use and regular conditioning. Tannic calfskin lasts 3–5 years. Shell cordovan, though more fragile initially, develops an extraordinary patina and can last up to 10 years. Vulcanised FKM rubber offers maximum longevity, exceeding 7 years even with intensive use and humid conditions.

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