Glashütte Original · Senator

Strap for Senator Diary Red Gold / Silver / Alligator / Pin

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

Lug width20 mm
Case diameter42 mm
Reference100-13-01-01-01
FamilySenator
MovementGlashütte Original caliber 100-13 hours, minutes, seconds | big date | alarm
Year2015
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 100-13-01-01-01

Selected for the 20 mm lug width · workshop selection

All 20 mm straps →

Frequently asked questions

What is the lug width of the Glashütte Original Senator 100-13-01-01-01?

The lug width is 20mm. This measurement is taken by placing a digital calliper or flexible measuring tape between the lug pins, in the internal seat where the strap sits. The 20mm width ensures compatibility with a wide range of bespoke straps, from leather to NATO fabric.

Which strap do you recommend for the Senator 100-13-01-01-01?

Given its dress watch nature in red gold, we recommend alligator, vegetable-tanned calf leather, or shell cordovan straps. For versatility, fine-weave NATO fabric or FKM rubber with a clip deployante ensure elegance in informal settings as well. Dark brown leather, aged burgundy, or black provide optimal chromatic contrast with red gold.

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

Use a spring bar tool to remove the pins from the lugs. Position the tool in the small lateral slot of the pin, apply gentle pressure towards the watch centre, and pull the strap outward. Once released, align the new strap's pins with the lugs and press until you feel a distinct click of the securing mechanism.

Is an aftermarket strap compatible with the Senator 100-13-01-01-01?

Yes. Any strap with a 20mm lug width is compatible. Always verify specifications with the retailer: our 20mm strap catalogue on milanostraps.it includes all tested solutions ready for dispatch, from natural leather to technical fabrics.

How long does a natural leather strap last on this watch?

Durability depends on the tanning method and usage. With vegetable tanning, expect 3–5 years of daily wear. Shell cordovan ages nobly and can last 7+ years. Alligator leather, if premium grade, resists 4–6 years. Humidity and perspiration accelerate wear: we recommend light maintenance with specialist products and rotation with alternative straps.

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