There are objects in horology that feel larger than the category they belong to. The Erwin Sattler Troja Lunaris M II is one of them. It is, on paper, a longcase precision pendulum clock, but that description only begins to explain what makes it so compelling. This is not simply a tall clock with an ornate case. It is a deeply considered horological structure, bringing together the measured calm of a regulator-style pendulum movement, the beauty of a hand-painted moon phase, the practical intelligence of 16 watch winders, and the discretion of a hidden safe.
For collectors, this is where the Troja Lunaris M II becomes especially interesting. A serious watch collection often requires more than storage. It needs protection, accessibility, mechanical care, and a setting worthy of the pieces it holds. Erwin Sattler has taken those needs and built them into a clock that still feels first and foremost like a work of high horology. The winders and safe are not afterthoughts added to a cabinet. They are integrated into a precision timekeeping object with the same sense of order, refinement, and mechanical discipline that defines Sattler’s best clockmaking.
The result is a longcase clock with a unique presence. It has the dignity of traditional furniture, the technical interest of exposed mechanical clockmaking, and the quiet practicality of a collector’s vault. Standing 219.5 cm high and weighing 242 kg, the Troja Lunaris M II is undeniably substantial, yet its design is carefully managed. The black varnished case, available with walnut and metal inlays or with metal inlays alone, has a clean architectural form. The U-shaped anti-reflective mineral glass door gives the piece an open and transparent character, allowing the eye to move across the dial, pendulum, escapement, and movement without visual obstruction.
The longcase clock carries centuries of horological history. Traditionally, these clocks were built around the pendulum, using height not merely for grandeur but for accuracy. The pendulum required space to swing, and the long case gave the weight drive room to run. In the Troja Lunaris M II, Erwin Sattler honours that lineage while rethinking what a longcase clock can be for a modern collector.
This is not a nostalgic reproduction. It is a refined, contemporary interpretation. The case retains the vertical authority of a traditional precision clock, but the detailing is controlled and modern. The anti-reflective glass, concealed safe, remotely operated lighting, and WiFi-programmable watch winders make it clear that this piece belongs to the present. Yet the core emotional appeal remains deeply traditional. A mechanical pendulum moving in calm, measured rhythm has a presence that no digital display can replace.
That rhythm is central to the character of the Troja Lunaris M II. The approximately one-metre-long pendulum swings once each second, producing a beat rate of 3,600 per hour, or 60 beats per minute. It brings a room to life in a way that is quiet, restrained, and almost meditative. In a world of instant updates and disposable devices, the steady pulse of a precision pendulum clock feels increasingly rare.
At the heart of the Troja Lunaris M II is the Sattler calibre 1915, based on the movement of the Secunda Lunaris. This is a serious movement, not only because of its visual beauty, but because of the precision-oriented engineering behind it. The 30-day power reserve is supplied by a 4,500 g weight with a ball-bearing pulley, giving the clock a long and practical running duration between windings.
The movement uses 9 precision ball bearings, 6 jewel bearings in chatons, and 2 agate anchor pallets. These details matter because they speak to the reduction of friction, long-term stability, and proper mechanical finishing. In a high-grade clock movement, efficiency and consistency are not abstract virtues. They are the foundation of reliable precision over long periods of time.
The oscillator is equally important. Erwin Sattler uses a 12 mm Invar pendulum with temperature and air-pressure compensation. Invar is valued for its low thermal expansion, helping the pendulum maintain greater consistency as room temperatures change. The system also includes 5 aneroid capsules and an air pressure display in mm/Hg, compensating for atmospheric changes that can influence pendulum behaviour. These are the sort of details that remind enthusiasts why traditional precision clockmaking remains such a specialised craft.
The Troja Lunaris M II is technically impressive, but it is also visually beautiful in a way that feels calm rather than excessive. The silver-plated dial provides an elegant, classical foundation for the indications. Its layout is refined, legible, and balanced, allowing the complications to be read clearly without losing the sense of mechanical theatre.
The hand-painted moon disc is one of the clock’s most charming details. A moon phase display has always carried a certain romance in mechanical timekeeping. It links the measured precision of gears and wheels to the slower rhythm of the night sky. On a wristwatch, a moon phase can feel poetic. On a longcase clock of this scale, it becomes even more atmospheric, especially when framed by the height of the case and the steady motion of the pendulum beneath.
The dial also includes a cutaway seconds dial, date and day displays, and a visible Graham escapement. The visible escapement is particularly satisfying. It allows the owner to see part of the regulating mechanism at work, turning timekeeping from an invisible process into something observable. This is where mechanical horology has a special advantage. It does not merely tell the time. It shows the act of timekeeping.
The hands add another layer of traditional craftsmanship. They are blue steel and domed by hand, bringing depth and subtle colour to the dial. The blue tone provides contrast against the silver-plated surface, while the hand-domed shaping gives the hands a three-dimensional quality that machine-flat components simply cannot match.
One of the most distinctive aspects of the Troja Lunaris M II is how it serves the needs of a watch collector. On both sides of the case are 16 precision watch winders, sideways extendable and individually programmable via WiFi. Each winder has its own high-power motor and is designed to return watches to the 12 o’clock position, keeping the presentation orderly and consistent.
This is a practical feature, but it is also beautifully aligned with the spirit of the clock. Automatic watches are mechanical objects that benefit from thoughtful care. A precision pendulum clock that houses and maintains them creates a satisfying relationship between different forms of mechanical timekeeping. The longcase clock becomes the anchor of the collection, while the watches it protects remain ready to wear.
The watch holders are designed for various strap lengths, making the system adaptable to a range of pieces. The winders are also illuminated, with lighting that can be separately switched and dimmed via remote control. Rather than hiding the collection away entirely, the Troja Lunaris M II allows it to be presented with dignity when the owner chooses.
The integrated safe in the base adds a more discreet dimension. Rated Euro / VdS Class I, it offers insurance cover up to €65,000 for private use and up to €20,000 for commercial use. It is fitted with an electronic keypad lock and has a DIN right door hinge. The safe itself weighs approximately 110 kg, with external dimensions of 610 mm high, 405 mm wide, and 340 mm deep. Inside, it measures 504 mm high, 312 mm wide, and 221 mm deep.
This hidden safe changes the character of the clock. It is not simply a showcase piece. It is a secure storage solution integrated into a high-end mechanical object. For collectors with important watches, jewellery, documents, or other valuables, this gives the Troja Lunaris M II a level of purpose that many luxury objects lack.
The updated Troja Lunaris M II also places strong emphasis on lighting. There is lighting inside the clock, indirect lighting behind the case, lighting in the base, and lighting for the winders. These are separately switchable and dimmable via remote control, allowing the owner to shape how the clock appears in the room.
This matters because a clock of this scale becomes part of the architecture of a space. The ability to control brightness and colour temperature means the Troja Lunaris M II can move from a subtle daytime presence to a softly illuminated evening focal point. The lighting does not exist only to show off the mechanics. It helps define the mood around the clock, drawing attention to the movement, dial, pendulum, safe, and winders in a controlled and elegant way.
Importantly, the lighting also reinforces the dual personality of the piece. It is both a precision instrument and an object of display. It is functional, yet theatrical. It can sit quietly in a room, but when illuminated, it reveals just how much is hidden within its tall, disciplined form.
What makes the Erwin Sattler Troja Lunaris M II so fascinating is not any single feature in isolation. A moon phase clock is special. A precision pendulum regulator is special. A collector’s safe is useful. Watch winders are practical. Ambient lighting is refined. But the Troja Lunaris M II combines all of these ideas in a way that feels coherent rather than crowded.
It is also a reminder that independent horology is not limited to wristwatches. Brands like Erwin Sattler keep alive a tradition of clockmaking that requires patience, scale, and mechanical understanding of a different kind. The tolerances, regulation, power delivery, pendulum behaviour, case construction, and long-term stability all require a particular form of expertise. In that sense, the Troja Lunaris M II is not just an object for a collector. It is a statement about what mechanical timekeeping can still be when treated seriously.
There is a quiet confidence to this clock. It does not chase novelty for its own sake. Instead, it takes traditional precision clockmaking and integrates modern collector needs in a thoughtful way. The watch winders are hidden until needed. The safe is concealed in the base. The lighting can be adjusted rather than imposed. The movement remains the centre of attention, supported by the surrounding architecture rather than overshadowed by it.
The Erwin Sattler Troja Lunaris M II is a rare creation for a very specific type of enthusiast. It will appeal to collectors who appreciate mechanical timekeeping beyond the wrist, people who understand that a serious collection deserves a serious home. It is technically impressive, visually composed, and unusually practical for something so refined.
As a new release, it shows how Erwin Sattler continues to develop the longcase clock without losing the soul of traditional horology. The Sattler calibre 1915, 30-day power reserve, compensated Invar pendulum, visible Graham escapement, hand-painted moon phase, 16 programmable winders, and integrated safe all contribute to an object that feels both classical and contemporary.
The Troja Lunaris M II is not simply about measuring time. It is about respecting it, storing it, protecting it, and presenting it with care. For collectors who value precision, craftsmanship, and the quiet drama of mechanical movement, it stands as one of the most distinctive longcase clocks in modern horology.
