
Arnold & Son Instrument DSTB Steel Black Dial
The Arnold & Son Instrument DSTB is a standout model that exemplifies the brand’s mastery of haute horology. Introduced at this year’s Baselworld, the DSTB – short for Dead-Beat Seconds – brings a rare mechanical complication into a stainless steel case, making it more accessible compared to the previous 2014 rose gold edition.

Dead-Beat Seconds – A Unique Complication
The defining feature of the Arnold & Son Instrument DSTB is its dead-beat seconds complication. Unlike a conventional mechanical seconds hand that moves multiple times per second, the DSTB seconds hand jumps precisely once per second, offering exceptional accuracy and visual clarity. The oversized eccentric seconds subdial, crafted from semi-transparent sapphire, highlights the underlying gear train and the 5 o’clock hour/minute subdial, creating an elegant balance between design and technical prowess.
Movement and Technical Excellence
Housed inside the 43.5mm stainless steel case is the in-house A&S 6003 manual-winding movement, consisting of 229 components and 32 jewels. Operating at 28,800 vibrations per hour, it provides a reliable 50-hour power reserve. The movement features a swirling dial motif that symbolizes the flow of time, while the NAC gray finish on the caseback rotor offers a modern and striking aesthetic. Every component reflects Arnold & Son’s commitment to fine watchmaking craftsmanship.
Design and Wearability
The stainless steel case not only makes the DSTB more attainable but also ensures durability and versatility. With a case diameter of 43.5mm, it offers substantial wrist presence without compromising comfort. The black dial contrasts elegantly with polished hands and markers, while the alligator leather strap adds sophistication. This watch is both a technical marvel and a statement of style.
Limited Edition and Collectibility
Limited to just 250 pieces, the Arnold & Son Instrument DSTB is a collectible timepiece that combines rare mechanical innovation with visual artistry. Priced at CHF 27,900, it represents an excellent opportunity for collectors seeking a unique dead-beat seconds watch in a refined and wearable package.
Specifications
Stainless steel case, 43.5 mm diameter, sapphire crystal case back, A&S 6003 movement, 32 jewels, 28,800 vph, 50-hour power reserve, alligator leather strap, water-resistant 30 meters.
Why Choose Arnold & Son Instrument DSTB
The DSTB Steel Black Dial perfectly demonstrates Arnold & Son’s horological expertise. Its rare dead-beat seconds mechanism, high-quality finishing, and artistic dial make it both a functional instrument and a collector’s masterpiece. Ideal for enthusiasts who value precision, innovation, and aesthetic refinement.
External References
Official Arnold & Son: Arnold & Son Instrument DSTB Collection