Alexandre Meerson · Altitude Officer

Strap for Altitude Officier Small Seconds

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

Lug width20 mm
Case diameter41 mm
Reference101OEJY
FamilyAltitude Officer
MovementAlexandre Meerson caliber AM-4808-A Hours, Minutes, Small Seconds
CaseTitanium

Spring bar

Swiss Standard universal spring bars

The right category for this model · 316L steel, all lug widths 13–26 mm

Straps for the Altitude Officer 101OEJY

Selected for the 20 mm lug width · workshop selection

All 20 mm straps →

The Altitude Officer 101OEJY, seen from the bench

The Alexandre Meerson Altitude Officer 101OEJY is a contemporary interpretation of military watch codes through rigorous geometric design. This model features a titanium case of 41mm diameter, a 20mm lug width, and houses the proprietary AM-4808-A caliber movement offering hours, minutes, and small seconds. The squared silhouette and integrated lugs distinguish it from nostalgic military revivals, positioning it as a functional instrument that documents utilitarian aesthetics in the 21st century.

Frequently asked questions

What is the lug width of the Alexandre Meerson Altitude Officer 101OEJY?

The lug width of the Altitude Officer 101OEJY is 20mm, an international standard for watches with case diameter between 40 and 44mm. This measurement is determined by the width of the internal seat within the case where the strap rests. To verify it, use a digital calliper by positioning the inner shoulders where the strap contacts the case: the resulting value will be 20mm. Do not confuse lug width with the total width of the strap at the case, as these may differ depending on the attachment design.

Which strap is recommended for the 101OEJY?

For the Altitude Officer 101OEJY, we recommend an alligator in dark grey or deep brown, which enhances the cold geometry of the titanium case. Alternatively, vegetable-tanned calf leather offers a biological patina that ages over time, developing rich hazelnut tones after 12–18 months. For a more utilitarian approach, a NATO strap in navy blue or taupe grey is ideal, whilst a fluoroelastomeric rubber with satin texture is perfect for humid environments or outdoor activities. Avoid warm tones such as reds and oranges, as titanium requires cool or neutral colour pairings.

How do you change the strap on the Alexandre Meerson Altitude Officer 101OEJY?

To change the strap on the Altitude Officer 101OEJY, use a dedicated spring bar removal tool. Position the watch with the dial facing downwards on a soft surface to prevent scratches on the titanium case. Insert the flat side of the spring bar tool into the notch of the pin, pushing gently downward until the internal spring is released; the old strap will detach. To install the new 20mm strap, align the lugs with the case holes and, using the same tool, press the pin until it clicks into place. Always verify that the pin is fully inserted before wearing the watch.

Is the 101OEJY strap compatible with other watch models?

The 20mm lug width of the Altitude Officer 101OEJY is compatible with any watch utilising the same attachment standard. Consult the technical specifications of your alternative model to confirm the lug width. However, it is important to consider visual proportions: a 20mm strap on watches with case diameter below 38mm will appear disproportionate, whilst on models above 44mm it will seem undersized. Our 20mm straps are specifically selected for this class of diameters, ensuring aesthetic harmony with the Altitude Officer design.

How long does a leather strap last on the 101OEJY?

The lifespan of a leather strap depends on the material and usage conditions. High-quality alligator, such as that proposed for the 101OEJY, offers an average life of 3–5 years with daily wear, thanks to its dense fibrous structure and natural resistance to abrasion. Vegetable-tanned calf generally lasts 2–3 years before showing signs of structural deterioration, although aesthetic patina develops after 12–18 months. Wear accelerates in high-humidity environments or with prolonged sun exposure. We recommend storing the strap in a cool, dry place when not worn, and avoiding prolonged contact with salt water or acidic perspiration. Periodic replacement maintains the Altitude Officer in optimal condition, without compromising the aesthetic legibility of the design.

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