Swatch · MoonSwatch

Strap for MoonSwatch Mission to Pluto

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
ReferenceSO33M101
FamilyMoonSwatch
MovementETA caliber G10.212 AB ND Hours, Minutes, Small Seconds | Chronograph, Rattrapante
CaseBioceramic

Spring bar

Swiss Standard universal spring bars

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

Straps for the MoonSwatch SO33M101

Selected for the 20 mm lug width · workshop selection

All 20 mm straps →

The MoonSwatch SO33M101, seen from the bench

The Swatch MoonSwatch SO33M101 features a 42mm bioceramic case inspired by Omega's lunar exploration watch, paired with a 20mm lug width. Launched in 2022, this quartz chronograph houses the ETA caliber G10.212 AB ND movement with rattrapante function, allowing successive time intervals to be measured without stopping the main chronograph. The bioceramic composite material offers superior resistance compared to traditional steel and develops a natural patina over time. Water resistance reaches 300 meters, suitable for swimming and snorkeling. The 20mm lug width represents optimal balance between visual presence and wearability for wrist circumferences between 160–185mm.

Frequently asked questions

What is the lug width of the Swatch MoonSwatch SO33M101?

The Swatch MoonSwatch SO33M101 features a lug width of 20 mm. This dimension is compatible with virtually all standard aftermarket straps, making it one of the most versatile models for aesthetic customisation.

What is the best strap for the MoonSwatch SO33M101?

The optimal choice depends on usage: for formal elegance, we recommend Italian leather in vegetable tanning or Mississippi alligator; for aquatic environments, vulcanised FKM rubber; for daily practicality, a ballistic nylon NATO strap. The bioceramic case deserves straps of conscious construction quality, not generic synthetics.

How do I change the strap on the MoonSwatch SO33M101?

Remove the original strap using a spring bar tool inserted into the articulation spring of the lower lug. Extract the spring with light perpendicular pressure, slide out the old strap, align the new strap pins to the case holes, and reinsert the spring. Verify correct engagement.

Are aftermarket straps compatible with the Swatch MoonSwatch SO33M101?

Yes, practically all 20 mm straps are compatible. However, verify that the terminals do not protrude beyond the case edges to maintain original aesthetics. The quality of finishes—stitching, leather grain, hardware—differentiates the user experience.

What is the lifespan of a leather strap for the MoonSwatch SO33M101?

A quality leather strap (vegetable tanning, alligator) lasts between 3 and 5 years with daily wear. Longevity depends on sun exposure, humidity, and maintenance: applying specific conditioners extends functional life. Rubber and NATO straps have similar lifespans, though they degrade aesthetically sooner.

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