Moritz Grossmann · Atum

Strap for Atum Primavera White Gold / Champagne

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
ReferenceMG-000978
FamilyAtum
MovementMoritz Grossmann caliber 100.1 hours, minutes, small seconds
Year2017
CaseWhite 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 Atum MG-000978

Selected for the 20 mm lug width · workshop selection

All 20 mm straps →

The Atum MG-000978, seen from the bench

The Atum by Moritz Grossmann features the manufacture caliber 100.1 with indication of hours, minutes and small seconds. The movement presents the brand's characteristic German architecture with traditional finishes. The case houses a manual-winding mechanism according to the canons of contemporary Saxon watchmaking.

Frequently asked questions

What is the lug width of the Moritz Grossmann Atum MG-000978?

The lug width of the Moritz Grossmann Atum MG-000978 is 20 millimetres. This measurement is the proportional standard for watches with a 41-millimetre case diameter, ensuring harmonious wrist presence without excess material. Always verify by measuring the internal lug distance from the inner point of one lug to the inner point of the other.

What is the best strap for the Moritz Grossmann Atum?

The best strap depends on intended use. For formal occasions: alligator in dark brown or black with vegetable-tanned finishing. For daily versatility: calf leather with natural patina development. For contemporary aesthetics: NATO in grey or beige. Material selection should respect the understated construction philosophy of German watchmaking, prioritising natural texture over artificial finishes.

How do you change the strap on the Moritz Grossmann Atum MG-000978?

Strap replacement requires two tools: a spring bar tool for peg extraction and a soft surface to protect the case. Insert the tool into the slot beside the spring bar, compress the internal spring until the peg releases, then extract the lug. Repeat on the opposite side. Position the new strap and reinsert the pegs until you feel the locking engagement.

Is an aftermarket strap compatible with the Moritz Grossmann Atum?

Yes, any strap with a 20-millimetre lug width is compatible with the Moritz Grossmann Atum MG-000978. Milano Straps provides a curated selection of straps in premium leather, NATO fabric, and technical rubber, all tested for compatibility with watches of this specification. Material and construction quality guarantee durability over time.

How long does a leather strap last?

Leather strap longevity depends on: frequency of use, ambient humidity, maintenance regimen, and tanning method. An alligator or vegetable-tanned calf strap, with proper care (regular dry cleaning, drying after water exposure), lasts 5-8 years. Shell cordovan, owing to superior density, can exceed 10 years. The natural patina development is integral to the aesthetic appeal of premium leather 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.

Request an appointment →

Casati Milano · Via XX Settembre 15, Milan · by appointment only