D. Dornblueth & Sohn · 99.0

Strap for 99.0

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

Lug width22 mm
Case diameter42 mm
Reference9.0 (01) RG
Family99.0
MovementD. Dornblueth & Sohn caliber 99.0 Hours, Minutes, Small Seconds
CaseRose 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 99.0 9.0 (01) RG

Selected for the 22 mm lug width · workshop selection

All 22 mm straps →

The 99.0 9.0 (01) RG, seen from the bench

The D. Dornblueth & Sohn 99.0 reference 9.0 (01) RG is equipped with the in-house caliber 99.0 with indication of hours, minutes and small seconds. The watch features 22mm lugs and German artisanal construction. The mechanical movement follows the Saxon watchmaking tradition with manual finishings.

Frequently asked questions

What is the lug width of the D. Dornblüth & Sohn 99.0 9.0 (01) RG?

The lug width is 22 millimetres. This measurement represents the internal space between the lugs protruding from the case. A 22mm strap must be cut to fit this exact depth, ensuring a secure connection without lateral movement.

Which strap is most suitable for the D. Dornblüth & Sohn 99.0 in rose gold?

We recommend genuine alligator in cognac brown or vegetable-tanned calf leather in fine grain for a rose gold case. Both create sophisticated chromatic interplay with the precious metal. Alternatively, burgundy shell cordovan offers superior durability whilst maintaining formal elegance.

How do you change the strap on a watch with a 22mm lug width?

You will require a spring bar tool (a thin lever) to compress the small springs (spring bars) located at the extremities of the lug pins. Whilst maintaining compression on the pin, slide the old strap outward, then insert the new strap by aligning its holes with the pins and releasing the compression. It is advisable to work on a soft surface to prevent case damage.

Are aftermarket straps compatible with the D. Dornblüth & Sohn 99.0 9.0 (01) RG?

Yes, provided they are tailored for a 22mm lug width. High-quality aftermarket straps (artisanal leather, alligator, shell cordovan) offer equivalent robustness to original straps. It is essential to verify that the strap has been specifically cut for this measurement to prevent improper seating.

What is the typical lifespan of a leather strap on a luxury watch such as the D. Dornblüth & Sohn?

Longevity varies based on material and environmental wear. A quality calf leather typically lasts 2–4 years with moderate daily use; alligator and shell cordovan extend this to 4–6 years owing to superior fibre structure. Exposure to humidity, heat and perspiration accelerates ageing. Vegetable tanning also permits partial patina regeneration with appropriate maintenance.

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