# MB&F LM Sequential Flyback – The Ultimate Dual‑Chronograph in Platinum The MB&F LM Sequential Flyback arrives as the newest limited‑edition entry in the brand’s celebrated Legacy Machine family. With only 33 pieces cast in platinum, the watch is a showcase of technical ambition wrapped in a strikingly classic silhouette. Designed by Stephen McDonnell, it melds a sky‑blue dial, white‑lacquered sub‑dials and a dual‑chronograph with flyback capability into a single, hand‑wound masterpiece. At a retail price of **US $218 000**, the piece is positioned as a collector’s item that pushes the limits of what a mechanical chronograph can do while staying unmistakably MB&F in spirit. Below we break down the watch’s heritage, design, movement, wearability, appropriate settings and overall value. ## Heritage — the model's place in the brand's line and its launch context MB&F’s **Legacy Machine** platform was introduced as a departure from the brand’s more kinetic “Horological Machines,” offering a cleaner, more conventional case architecture that still carries the label’s avant‑garde DNA. The line’s first notable entry, the **LM Perpetual**, debuted in **2015** as a dress‑oriented, manually‑wound piece (source: brand_models). Since then, MB&F has expanded the range with increasingly complex complications, each iteration retaining the signature “tilted‑dial” aesthetic while adding new functions. The **LM Sequential Flyback** marks the latest evolution of this philosophy. Launched in **2024** (reference 10.PL.BU), it is a limited run of **33 platinum examples**. The watch arrives at a time when MB&F is consolidating its reputation for ultra‑complicated, hand‑crafted movements—evidenced by the previous **LM EVO**, which earned the **GPHG “Aiguille d’Or”** (as noted in the positive reviews). The Flyback therefore inherits a pedigree of award‑winning engineering while delivering a fresh functional twist: a dual chronograph, each equipped with a flyback mechanism, plus a “Twinverter” switch that unlocks multiple timing modes. In short, the LM Sequential Flyback sits at the apex of the Legacy Machine chronology, marrying the line’s classic visual language with the most elaborate chronograph architecture MB&F has produced to date. ## Design & Case — case dimensions, materials, dial At **44 mm** in diameter, the LM Sequential Flyback presents a bold but balanced footprint. The case is machined from **platinum**, a choice that underscores the watch’s exclusivity and adds a subtle, warm luster that deepens with age. The **screwed lugs**—a hallmark of the Legacy Machine aesthetic—anchor the piece to a **leather strap**, as confirmed by the official description (“on a leather strap”). While the strap material is not detailed beyond “leather,” the combination of a supple band with the weight of platinum creates a harmonious tension between comfort and gravitas. The dial is the visual centerpiece. A **sky‑blue dial plate** serves as a vibrant backdrop for **white‑lacquered sub‑dials**, each finished with immaculate hand‑applied lacquer. The main hour and minute displays are **tilted**, reinforcing the Legacy Machine’s signature off‑center geometry. Sub‑dials are positioned in a symmetrical layout, their white lacquer providing high contrast against the blue background and making each hand and index instantly legible. The overall styling is described as “more classic Legacy Machine,” suggesting a return to the line’s original clean lines after the more experimental cases of recent years. The watch’s **screwed lugs** not only secure the strap but also reinforce the structural integrity of the case, an important consideration given the 619‑component movement housed within. ## Movement & Performance — calibre, power reserve, accuracy At the heart of the LM Sequential Flyback lies an **in‑house calibre** of the same name. It is a **hand‑wound** movement featuring **619 components** and **63 jewels**, operating at a frequency of **3 Hz** (21,600 vibrations per hour). The calibre delivers a **72‑hour power reserve**, a respectable figure for a manually‑wound chronograph of this complexity. The movement’s defining feature is its **dual chronograph with flyback** capability. Both chronographs can be started, stopped and reset **independently**, and each offers a **flyback** function that instantly returns the hands to zero without a separate reset action. Operationally, the left‑hand chronograph is controlled via the start/stop pusher at **10 o’clock** and the reset/flyback pusher at **8 o’clock**; the right‑hand chronograph mirrors this layout, with its start/stop at **2 o’clock** and reset/flyback at **4 o’clock**. This layout allows the wearer to run two timing sequences simultaneously—a rare feature even among high‑end chronographs. Beyond the two chronographs, the calibre incorporates a **Twinverter switch**, a mechanical selector that toggles between multiple timing modes. While the exact modes are not enumerated in the source data, the description (“Combining the new flyback function with the other timing modes of the Sequential calibre offers even more functionality”) confirms that the switch expands the watch’s utility beyond a simple dual‑chronograph. Water resistance is rated at **30 m**, a notable reduction from the **80 m** rating of the preceding EVO model (negative review). This limitation reflects the watch’s focus on horological complexity rather than rugged utility; the case is not intended for swimming or diving. Overall, the movement represents a tour de force of mechanical engineering: a dense, hand‑wound architecture that delivers two independent flyback chronographs, a multi‑mode selector, and a respectable power reserve within a 44 mm platinum case. ## On the Wrist — wearability, lug‑to‑lug, comfort notes The LM Sequential Flyback’s **44 mm** case places it firmly in the “large‑diameter” category, a size that commands a strong wrist presence. While the exact **lug‑to‑lug** measurement is not disclosed, the case’s overall diameter and the presence of **screwed lugs** suggest a well‑proportioned spread that aligns with contemporary luxury sport watches. The **platinum** construction adds noticeable weight, lending the piece a solid, reassuring feel on the wrist. Paired with a **leather strap**, the watch benefits from a degree of flexibility that mitigates the heft of the metal. The strap’s softness conforms to the wearer’s wrist, while the screw‑in lugs ensure a secure attachment, preventing any slippage during active use. Because the watch is **hand‑wound**, the wearer must regularly wind the crown to maintain power. The crown’s position (standard at 3 o’clock) is ergonomically placed, allowing easy access without disturbing the chronograph pushers. The dual chronograph pushers—situated at 8, 10, 2 and 4 o’clock—are spaced to be comfortably reachable with the thumb and forefinger, facilitating rapid operation of the start/stop and flyback functions. The limited **30 m water resistance** means the watch should be removed before any water exposure beyond light rain or hand‑washing. This restriction does not detract from its wearability in everyday or formal settings, but it does preclude it from being a true “sports” watch in the traditional sense. In practice, the LM Sequential Flyback feels like a statement piece: it commands attention without being ostentatious, and its ergonomic layout makes the complex chronograph functions surprisingly intuitive once the user becomes familiar with the push‑button scheme. ## When to Wear — occasion, setting and dress‑code fit The LM Sequential Flyback straddles the line between **sport** and **dress**—a duality echoed in the positive reviews (“This is still one incredible watch in sport or dress mode”). Its **sky‑blue dial** and **white lacquered sub‑dials** give it a vibrant, almost celebratory look that works well with tuxedos, black‑tie attire, or high‑end business suits. The platinum case and leather strap further reinforce its suitability for formal occasions, while the chronograph functionality adds a sporty edge that can complement a tailored blazer‑and‑trousers ensemble for a high‑stakes business meeting or a cocktail reception. Given the **30 m water resistance**, the watch should not be worn for activities involving immersion—such as swimming, sailing, or heavy water sports. However, it is perfectly at home at a **golf tournament**, a **yacht club gathering** (where exposure to splashes is minimal), or a **luxury car launch** where the wearer wishes to showcase both technical prowess and aesthetic refinement. In summary, the LM Sequential Flyback shines in environments that value **exclusivity, craftsmanship, and functional elegance**—from boardrooms and gala events to private watch‑collector showcases. ## Value & Verdict — price‑positioning + final take Priced at **US $218 000** for a limited run of **33** platinum pieces, the LM Sequential Flyback sits at the apex of ultra‑luxury horology. Its value proposition rests on three pillars: 1. **Rarity** – Only 33 examples exist, each bearing a unique serial number, ensuring scarcity that appeals to serious collectors. 2. **Technical Innovation** – A dual chronograph with independent flyback functions, a Twinverter timing selector, and a hand‑wound movement of 619 components place the watch among the most mechanically sophisticated chronographs currently available. 3. **Design Continuity** – The piece respects the Legacy Machine’s classic silhouette while introducing a fresh sky‑blue dial, making it both a nod to the past and a forward‑looking statement. The **negative reviews** highlight two clear drawbacks: the **reduction in water resistance** from the previous EVO’s 80 m to just 30 m, and the **extremely high price**. For a buyer whose primary concern is daily practicality, the limited water resistance may be a decisive factor. For those whose focus is on horological achievement and collectability, the price—while steep—reflects the cost of hand‑crafted platinum, a complex in‑house movement, and the limited‑edition status. **Verdict:** The MB&F LM Sequential Flyback is a masterclass in mechanical ingenuity wrapped in a timeless, platinum‑filled case. It delivers a level of chronograph complexity rarely seen outside the most exclusive ateliers, and its aesthetic is both bold and refined. While the price and modest water resistance limit its practicality, for collectors seeking the pinnacle of the Legacy Machine lineage, the watch offers an unparalleled blend of function, form, and exclusivity. In the words of one reviewer, “the LM Sequential Flyback is the stuff watchmaking dreams are made of”—and for those who can afford the dream, it truly lives up to that promise.