Mühle Glashütte · Terranaut

Strap for Terranaut I Trail Black / Strap

Takes 22 mm straps. Verified lug width, the straps that fit this model, and answers to the most common questions.

Lug width22 mm
Case diameter44 mm
ReferenceM1-40-53-NB
FamilyTerranaut
MovementMühle Glashütte caliber MU 9413 Hours, Minutes, Small Seconds | Date, Day | Chronograph
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 Terranaut M1-40-53-NB

Selected for the 22 mm lug width · workshop selection

All 22 mm straps →

The Terranaut M1-40-53-NB, seen from the bench

The Terranaut from Mühle Glashütte is equipped with the automatic caliber MU 9413 with functions of hours, minutes, small seconds, date, day and chronograph. The watch features 22mm lugs and offers a full layout for daily use. The internal movement ensures the chronograph functions integrated into the dial design.

Frequently asked questions

What is the lug width of the Mühle Glashütte Terranaut M1-40-53-NB?

The Mühle Glashütte Terranaut M1-40-53-NB features a lug width of 22mm. This measurement represents the distance between the innermost points of the watch case lugs and is critical for aftermarket strap compatibility. When replacing the original strap, ensure that your new strap is specifically designed for 22mm lugs.

Which strap is most suitable for the Mühle Glashütte Terranaut M1-40-53-NB?

The Mühle Glashütte Terranaut M1-40-53-NB pairs exceptionally well with alligator leather straps featuring natural grain finish, which underscore its technical character. Equally excellent are vegetable-tanned calf straps, which develop a rich patina over time. For professional and outdoor use, robust NATO fabric straps or cold-vulcanised rubber straps are recommended. The choice depends on your intended usage and personal aesthetic preferences.

How do I change the strap on the Terranaut M1-40-53-NB?

To replace the strap on the Mühle Glashütte Terranaut M1-40-53-NB, you must remove the spring bars using a dedicated tool. Position the watch on a soft surface to avoid case damage. Gently press each spring bar inward until it disengages from its hole. Insert the new strap in the opposite direction, ensuring the spring bars are correctly seated in the holes. We recommend entrusting this operation to a professional if you lack experience.

Can I use a generic aftermarket 22mm strap on the Mühle Glashütte Terranaut M1-40-53-NB?

Technically yes, since the Terranaut M1-40-53-NB accommodates 22mm lugs. However, not all 22mm straps are equal: material quality, thickness, flexibility, and finish vary considerably. For a watch of this calibre, we recommend straps crafted by specialised artisans who understand Saxon aesthetics and the robustness required for a tool chronograph such as the Terranaut.

How long does a leather strap last on the Mühle Glashütte Terranaut M1-40-53-NB?

A high-quality leather strap, such as alligator or vegetable-tanned calf, typically lasts 3-5 years with daily wear, provided it is properly maintained. Prolonged exposure to moisture, excessive heat, and direct sunlight accelerates deterioration. A robust NATO fabric strap may last longer, approximately 5-7 years, owing to material durability. Periodic strap replacement is part of the ordinary maintenance routine for a fine timepiece.

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