The Hourstriker Verdict
The Promenade Midnight Pearl from Czapek has a just stunning timepiece that uses a sandwich dial made up of Tahitian mother-of-pearl underneath blue aventurine glass. The combined effect of these stacked materials is just mind-blowing. The watch is housed in a 38 mm stainless steel case and is powered by an in-house Calibre SXH5.1 with small seconds. Overall, the Promenade Midnight Pearl is a homerun for Czapek.
— Peter, Editor-in-Chief
Independent watchmaker Czapek has released the Promenade Midnight Pearl, a time-only execution featuring an asymmetric dial layout and a proprietary material application. Building on the established architecture of the brand's in-house manufacturing capabilities, this model utilizes a composite dial structure developed in collaboration with Swiss dial specialist GT Cadrans. The watch operates on a heavily modified variant of the SXH5 caliber, explicitly re-engineered to reposition the running seconds indicator to the four-thirty position. Production of this specific reference is capped at a strict thirty-eight pieces globally, reflecting the low yield rates associated with the dial manufacturing process. Czapek positions the Promenade line as a platform for material experimentation, diverging from the integrated-bracelet sports watch category dominated by their Antarctique collection. By utilizing a traditional round case and conventional lug geometry, the focus shifts entirely to the dial execution and the micro-rotor movement visible through the exhibition caseback. The specific geometry of the heavily faceted indices and skeletonized hands acts as a modern counterbalance to the classical lines of the polished bezel and tapered lugs, creating a deliberate tension between traditional case manufacturing and contemporary dial execution.
The introduction of this patented dial construction represents a specific technical solution to a persistent manufacturing challenge in high-end horology: achieving visual depth without adding excessive physical thickness to the watch head. Typically, utilizing both mother-of-pearl and aventurine glass in a single timepiece requires stacking standard-thickness discs, resulting in a thick dial that necessitates higher hand pinions and a proportionally thicker case. Czapek and GT Cadrans circumvented this by developing a methodology to thin these highly brittle materials to extreme tolerances. The resulting component measures just 0.4 millimeters in total thickness, maintaining the slim 10.8-millimeter overall height of the watch. This release underscores the ongoing trend within the independent watchmaking sector to leverage specialized, low-volume suppliers to achieve material applications that larger industrialized brands cannot execute at scale.

Courtesy of Czapek
The Case and Dial
The Promenade Midnight Pearl is housed in a 38-millimeter stainless steel case, featuring a lug-to-lug measurement of 42 millimeters and a total height of 10.8 millimeters. The decision to maintain a 38-millimeter diameter ensures the piece remains proportional on a wide variety of wrist sizes, avoiding the common pitfall of oversized contemporary dress watches. These dimensions place the watch firmly within the traditional dress watch category, though the dial materials and casework provide a distinctly contemporary aesthetic. The case architecture is characterized by a polished, sloped bezel that transitions into the polished top surfaces of the lugs, while the mid-case flanks exhibit a horizontal brushed finish. This alternating surface treatment requires precise masking during the polishing phase to ensure sharp transitions between the brushed and highly reflective areas. The dial is protected by a glass-box sapphire crystal, a component that mimics the domed profile of mid-century acrylic crystals but requires diamond-tipped tooling to shape from synthetic corundum. Both the primary crystal and the sapphire exhibition caseback are treated with an anti-reflective coating on their inner surfaces to reduce glare and maximize the visibility of the dial and movement. The case construction yields a water resistance rating of 5 ATM, providing sufficient protection against ambient moisture and brief submersion, which aligns with the standard specifications for non-diving horology.
The focal point of this reference is the dial, manufactured using a patented sandwich technique that permanently bonds Tahitian mother-of-pearl with an upper layer of blue aventurine glass. Tahitian mother-of-pearl, composed of aragonite secreted by the Pinctada margaritifera oyster, is utilized as the base layer for its inherent dark grey tone and specific violet-green optical interference patterns. This organic base is milled down to a thickness of approximately 0.2 millimeters. The upper layer consists of aventurine glass, a synthetic material created by introducing copper or other metallic oxides into molten glass, which crystallize during the cooling process to form suspended metallic flakes. This aventurine layer is also thinned to 0.2 millimeters before being bonded to the nacre base. The extreme fragility of both materials at these tolerances results in a high rejection rate during manufacturing, as the glass is prone to fracturing during the final polishing stages. The combination of the two layers allows the iridescent properties of the mother-of-pearl to remain visible through the semi-translucent blue aventurine, creating an uneven, dynamic light play that shifts depending on the viewing angle and ambient light conditions.
Machining the dial to accommodate the hands and applied indices requires specialized CNC programming to prevent the composite disc from delaminating or shattering. The applied indices are heavily faceted, rhodium-plated metal, shaped as elongated arrows that point toward the central pinion. The hands follow a skeletonized Dauphine profile, terminating in sharp points that reach the outer perimeter of the dial, leaving the central sections open to maximize the visible area of the aventurine. The most complex operation on the dial is the execution of the small seconds subdial located at the four-thirty position. Instead of applying a secondary ring or painting a track, GT Cadrans mills a shallow, circular groove directly into the aventurine top layer. This milling process must remove enough of the glass to create a distinct visual boundary for the subdial without breaking through to the underlying mother-of-pearl base. The resulting track features a matte texture that contrasts with the polished surface of the surrounding dial, surrounded by small, applied white markers denoting the seconds.

Courtesy of Czapek
The Movement
Powering the Promenade Midnight Pearl is the Calibre SXH5.1, an in-house automatic movement developed specifically to accommodate the asymmetrical dial layout of this model. The standard SXH5 caliber utilizes a center-seconds configuration, requiring Czapek's movement engineers to re-route the gear train to position the fourth wheel—which drives the seconds hand—at the four-thirty axis. This modification demonstrates the flexibility of the SXH5 architecture, allowing the brand to alter the display format without designing an entirely new base caliber. The movement measures 30 millimeters in diameter and 4.2 millimeters in height, comprising 127 individual components and 26 jewels. It operates at a frequency of 4 Hertz, or 28,800 vibrations per hour, utilizing a Swiss lever escapement. The regulating organ features a free-sprung, variable-inertia balance wheel equipped with four adjustable gold inertia blocks. By adjusting these weights, watchmakers can alter the moment of inertia to regulate the timing rate, a system that generally offers superior long-term isochronism and shock resistance compared to a standard smooth balance wheel with a regulated hairspring.
The winding system relies on a micro-rotor, a design choice that keeps the movement height low while preventing the rotor from obstructing the view of the finishing and architecture. Because a micro-rotor has a significantly smaller diameter than a central oscillating weight, it generates less kinetic torque during the wearer's daily movements. To compensate for this reduced leverage, Czapek machines the rotor from 100 percent recycled platinum. Platinum possesses a specific gravity of 21.45 grams per cubic centimeter, making it substantially denser than gold or tungsten, thereby maximizing the winding mass within the confined spatial parameters. This platinum micro-rotor efficiently tensions the mainspring inside a single barrel, which stores enough energy to provide a 60-hour power reserve with a barrel torque of 8 Newton millimeters. The use of a micro-rotor requires the gear train to be arranged on a single plane, leading to the highly specific bridge layout visible through the sapphire caseback.
The visual architecture of the SXH5.1 is defined by seven distinct, skeletonized bridges that secure the gear train, a structural layout directly inspired by the pocket watches produced by François Czapek in the mid-nineteenth century. These bridges are treated with a dark, sandblasted finish that contrasts sharply with the rhodium-plated wheels and the bright ruby bearings. The finishing techniques applied to these components adhere to high horological standards, featuring straight-grained flanks and pronounced beveling along the edges. The watchmakers execute hand-chamfered inward angles on several of the bridges, a labor-intensive polishing technique that requires manual filing and polishing with specialized wooden pegs, as CNC machines cannot replicate the sharp internal vertices. The base plate is decorated with circular graining, and the open ratchets allow visibility into the winding mechanism. The contrast between the matte, dark grey bridges and the highly polished, bright chamfers creates a stark, industrial aesthetic that differs significantly from traditional Geneva-striped movement decoration.

Courtesy of Czapek
The Strap
The Czapek Promenade Midnight Pearl is delivered on a dark blue nubuck leather strap that visually integrates with the deep tones of the aventurine dial. Nubuck is top-grain cattle leather that has been sanded or buffed on the grain side to produce a slight nap of short protein fibers, resulting in a matte, velvet-like surface. This material choice provides a distinct textural contrast to the highly polished surfaces of the steel case and the reflective qualities of the glass dial. The strap is secured with a standard stainless steel pin buckle, maintaining a low profile on the underside of the wrist.
For buyers seeking a different aesthetic and functional profile, Czapek offers an alternative Milanese mesh bracelet manufactured from stainless steel. Milanese mesh consists of densely woven steel wires that form a flexible, highly durable band that conforms closely to the shape of the wrist. This bracelet option significantly alters the visual weight of the watch, shifting it from a traditional dress application toward a more robust, daily-wear context. The fine articulation of the mesh ensures proper ventilation and comfort, while the lack of traditional links eliminates the need for complex sizing adjustments.

Courtesy of Czapek
Pricing and Availability
The Czapek Promenade Midnight Pearl is produced as a strict limited edition of 38 pieces globally. This production cap is a direct consequence of the low yield rates and extensive manual labor required to manufacture the patented mother-of-pearl and aventurine composite dials. The retail price is set at $26,300 USD, excluding applicable local taxes.
This pricing structure positions the model competitively within the independent sector, specifically when accounting for the proprietary micro-rotor movement and the specialized dial manufacturing. Distribution is handled directly through Czapek's boutique network and authorized retail partners. Given the low production volume and the current market demand for independent horology featuring unconventional material applications, allocation is expected to be tightly controlled.

Courtesy of Czapek
Technical Specifications
Case: 38mm stainless steel, 10.8mm height, 42mm lug-to-lug, glass-box sapphire crystal, sapphire caseback, 5 ATM water resistance.
Movement: In-house Calibre SXH5.1, automatic micro-rotor (100% recycled platinum), 30mm diameter, 4.2mm height, 127 components, 26 jewels, 4Hz (28,800 vph), 60-hour power reserve.
Dial: Patented sandwich construction (0.2mm Tahitian mother-of-pearl base, 0.2mm blue aventurine glass top layer), small seconds at 4:30, applied rhodium-plated metal indexes.
Strap: Dark blue nubuck leather strap or stainless steel Milanese mesh bracelet.
Price: $26,300 USD (before taxes).
Reference Number: Promenade Midnight Pearl.
Notes: Limited edition of 38 pieces.