Glashütte Original · Senator

Strap for Senator Chronometer Regulator Red Gold / Silver / Alligator / Folding

Takes 21 mm straps. Verified lug width, the straps that fit this model, and answers to the most common questions.

Lug width21 mm
Case diameter42 mm
Reference1-58-04-04-05-50
FamilySenator
MovementGlashütte Original caliber 58-04 hours, minutes, small seconds | big date | power reserve indicator
Year2013
CaseRed Gold

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 1-58-04-04-05-50

Selected for the 21 mm lug width · workshop selection

All 21 mm straps →

The Senator 1-58-04-04-05-50, seen from the bench

The Glashütte Original Senator features the in-house caliber 58-04 with hour, minute, small second, big date and power reserve indication. The movement boasts the characteristic finishes of the Saxon manufacture with three-quarter plate and golden screws. 21mm lugs for leather or metal straps.

Frequently asked questions

What is the lug width of the Glashütte Original Senator 1-58-04-04-05-50?

The Glashütte Original Senator 1-58-04-04-05-50 features a lug width of 21.00 mm. This measurement is specific to this model and represents an intermediate standard between the 20 mm of classic compact timepieces and the 22 mm of larger chronographs. It is essential to respect this exact measurement to ensure proper fit between the case and the strap, avoiding visible gaps or excessive tension on the internal spring bars.

What is the best strap for the Glashütte Original Senator 1-58-04-04-05-50?

The optimal choice depends on intended use and aesthetic preference. For formal occasions, Mississippi alligator in cognac brown or deep black represents the most sophisticated pairing, as the natural grain and evolving patina dialogue naturally with the rose gold case. Vegetable-tanned calf leather offers denser fibres and superior tactile quality, with colours that mature over time. For daily versatility, a NATO in slate grey or navy blue maintains elegance without formality, whilst structured vulcanised rubber is ideal for those who wear the watch in less formal environments.

How do I change the strap on the Glashütte Original Senator 1-58-04-04-05-50?

Strap replacement is accomplished via the spring bars located at the case extremities. These small metal cylinders snap into the lug holes and hold the strap securely. To remove the current strap, use a specialised tool—a fine flat-head screwdriver or spring bar remover—to compress the internal spring and release the bar from the hole. Once the bar is removed, the strap detaches easily. To install a new strap, insert the bar into the hole whilst maintaining light pressure until it clicks into position. This operation should be performed on a soft surface, such as a cotton mat, to prevent case damage.

Can I use a high-quality aftermarket strap on this watch?

Absolutely. A quality aftermarket strap, provided it is crafted from noble materials (alligator, vegetable-tanned calf, natural vulcanised rubber) and constructed artisanally, is entirely compatible with the Glashütte Original Senator 1-58-04-04-05-50. The critical element is adherence to the 21 mm lug width: any strap of this measurement, equipped with standard spring bars (1.5–1.8 mm diameter), fits perfectly. Many luxury watch owners prefer aftermarket options precisely because they enable rotation amongst different materials without investment in multiple original straps, whilst maintaining construction excellence and aesthetic coherence.

How long does a leather strap last on this model?

Leather strap longevity depends on three factors: material quality, frequency of wear, and maintenance. A high-quality alligator or vegetable-tanned calf, worn 4–5 days per week under normal conditions (not exposed to excessive perspiration or persistent humidity), maintains structural integrity for 3–5 years. With rotation amongst different straps (changing every 2–3 days), longevity extends significantly as the material has time to recover shape between uses. Regular maintenance—cleaning with a damp cloth, annual conditioning with specialised products—extends useful life by 20–30 percent. A natural vulcanised rubber strap, conversely, degrades more slowly (5–7 years) as it is not subject to the progressive thinning typical of leather, though it requires protection from prolonged direct UV exposure.

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