Fortis Marinemaster M-44 DLC

Fortis has expanded its Marinemaster collection with the introduction of two new M-44 models treated with a Diamond-Like Carbon (DLC) coating. Designated as the Black Resin and Gravity Black, these references represent the brand’s integration of advanced surface hardening techniques into its flagship professional dive watch platform. The core architecture remains rooted in the established 44mm Marinemaster case, yet the application of the proprietary Dianoir DLC coating fundamentally alters the physical properties and visual profile of the watches. By shifting from brushed or bead-blasted stainless steel to a heavily industrial, matte black finish, Fortis addresses the specific requirements of saturation diving and harsh terrestrial environments where high contrast and low reflectivity are strictly mandated. Both iterations utilize recycled stainless steel for the base case construction, aligning with contemporary manufacturing standards, before undergoing the vacuum deposition process required for the DLC application.

The introduction of these models signifies a continued reliance on high-performance mechanics, specifically the Manufacture Calibre Werk 11 produced in partnership with Kenissi. This movement transition, which Fortis initiated in recent years, moves the brand away from off-the-shelf third-party ebauches and provides a certified chronometer standard with a substantial 70-hour power reserve. Positioned at a retail price of $5,450.00, the DLC Marinemasters enter a highly competitive segment of the luxury tool watch market. They are designed for end-users who require precise timing instruments capable of withstanding 50 atmospheres of pressure. The differentiation between the two models is strictly visual, focusing on the dial hardware and hand-set colors to offer varied high-contrast reading solutions against the deeply textured, light-absorbing black dials.

The Case and Dial

The geometric foundation of the M-44 DLC is built upon a 44mm recycled stainless steel case characterized by an aggressively short 48mm lug-to-lug distance. This specific ratio dictates how the watch interfaces with the wrist, mitigating the traditional overhang associated with 44mm cases and centering the 102-gram watch head securely on the arm. The total height is measured at 14mm, a dimension necessitated by the thick sapphire crystal and the internal structural requirements for a 500-meter water resistance rating. The critical upgrade for these references is the proprietary Dianoir Diamond-Like Carbon coating. Unlike standard Physical Vapor Deposition (PVD), which primarily alters color, the DLC process deposits a microscopic layer of carbon isotopes onto the steel, resulting in a surface hardness of 4,500 Vickers. This rating is roughly twenty times harder than untreated 316L stainless steel, providing exceptional resistance to abrasion, chemical exposure, and saltwater corrosion. The visual result is a highly uniform, non-reflective matte anthracite finish that absorbs ambient light and prevents glare in high-luminosity environments.

Operational security is managed via the bidirectional gear bezel, which incorporates the Fortis Lock System. This proprietary mechanism requires the user to physically disengage the lock to adjust the bezel, eliminating the possibility of accidental unidirectional rotation during critical decompression stops or timing operations. The bidirectional nature of the bezel, governed by this locking mechanism, allows it to be used for both count-up and count-down timing operations, providing greater flexibility for terrestrial navigation or aviation tasks compared to a strictly unidirectional dive bezel. The bezel edge features pronounced, widely spaced gear teeth designed for direct manipulation with heavy neoprene dive gloves. The crown, positioned at 3 o'clock, is a screw-down variant utilizing a triple gasket system constructed from performance FKM (Fluoroelastomer) to ensure structural integrity at 50 atmospheres. The case back of the Black Resin model features a DLC Dianoir finish with a deep engraving of a wind rose motif, while the Gravity Black variant specifies a standard stainless steel case back with the same engraving. Both case backs are secured firmly to maintain the high pressure rating, and the entire assembly houses a sapphire crystal equipped with anti-reflective coating on both the internal and external surfaces to maximize dial legibility.

Beneath the sapphire crystal, the dials of both models execute a strict high-contrast design language built upon a heavily textured base. The dials feature the proprietary Fortis O-pattern, a deep, repeating grid of raised squares that provides a three-dimensional topography. This texture diffuses light entering the dial, further reducing glare and providing a matte backdrop that pushes the applied indices to the visual foreground. The indices are substantial, applied rectangular markers filled heavily with Superluminova X1, a high-grade luminous compound that emits a strong blue glow in low-light conditions. The chapter ring is steeply angled, featuring a printed minute track with numerical designations at five-minute intervals, matching the color palette of the respective model's hardware. A color-matched date window is positioned at 3 o'clock, maintaining the utilitarian symmetry of the dial without removing the 3 o'clock index entirely.

The distinction between the two models lies in their specific handset and index execution. The Black Resin variant utilizes metallic golden hardware for the hour, minute, and sweep second hands, as well as the borders of the applied indices. This gilt-style approach creates a warm, high-visibility contrast against the stark black DLC case and dial, recalling the visual language of vintage saturation divers while utilizing modern luminous materials. The hour and minute hands are broad, sword-style designs, faceted to catch minimal light even in the matte environment. The second hand features a "Bull's Eye" luminous pip counterweight for immediate operational verification in the dark. Conversely, the Gravity Black model employs a more contemporary, high-visibility scheme. It features metallic borders on the indices and a metallic hour hand, but isolates the minute hand entirely by rendering it in a vivid orange. This specific color isolation is a standard operating procedure in modern dive watch design, ensuring the diver's eye is immediately drawn to the most critical timing element against the bezel track. The Gravity Black also features orange accents on the chapter ring and the '13' date wheel indicator, maintaining a cohesive aesthetic logic across the dial surface.

The Movement

Powering the M-44 DLC series is the Manufacture Calibre Werk 11, an automatic movement developed in close collaboration with the Swiss mechanical manufacturer Kenissi. This partnership represents a significant technical elevation for the Marinemaster line, substituting standardized off-the-shelf movements with a highly specialized, purpose-built tractor caliber. The Werk 11 operates at a standard modern beat rate and provides a substantial 70-hour power reserve. This extended reserve allows the watch to be removed on a Friday evening and picked up on Monday morning without requiring manual winding or time resetting, a feature highly sought after in modern luxury sports watches. The rotor, while hidden behind the solid case back, is engineered for bilateral winding efficiency, ensuring the mainspring reaches its maximum tension rapidly through the natural kinetic motion of the wearer's arm. The movement undergoes rigorous external testing to achieve chronometer certification from the Contrôle Officiel Suisse des Chronomètres (COSC), guaranteeing an average daily precision rate of -4 to +6 seconds across various positions and temperatures.

From an architectural standpoint, the Werk 11 is engineered specifically for durability and shock resistance. It utilizes a variable inertia balance wheel. Unlike traditional index-regulated movements where a regulator pin adjusts the active length of the hairspring, variable inertia regulation involves adjusting small weights located directly on the rim of the balance wheel. This system allows for highly precise timing adjustments and ensures that the rate remains stable even when the watch is subjected to high-impact shocks. Furthermore, the balance wheel is secured by an oversized traversing balance bridge with a double fixation system. Securing the balance assembly on both sides, rather than relying on a single-sided balance cock, significantly increases the structural rigidity of the escapement module. This over-engineered approach to the regulating organ is essential for a watch designed to withstand the physical abuse associated with professional diving and harsh terrestrial expeditions.

The Strap

Both the Black Resin and Gravity Black references are delivered on the Fortis Horizon Strap, a highly engineered attachment system constructed from hypoallergenic FKM rubber. FKM, or Fluoroelastomer, is superior to standard vulcanized rubber or silicone in nearly every metric, offering exceptional resistance to extreme heat, harsh chemical exposure, and long-term ultraviolet radiation degradation. This material choice ensures the strap will not become brittle, crack, or fade after prolonged exposure to saltwater and direct sunlight.

The visual design of the Horizon Strap directly mirrors the architectural cues of the watch head. The exterior surface features a repeating, raised block texture that seamlessly extends the Fortis O-pattern found on the dial down the length of the wearer's wrist. The strap is secured to the short lugs using a robust screw pin mounting system, which provides a far more secure connection than standard spring bars. It is fastened via a heavily machined stainless steel pin buckle that is coated in the same Dianoir DLC finish as the case, maintaining the stealth aesthetic.

Pricing and Availability

The Fortis Marinemaster M-44 DLC Black Resin and Gravity Black are both priced at a retail MSRP of $5,450.00. This pricing structure positions the models competitively within the upper tier of the independent Swiss tool watch sector, directly challenging other Kenissi-powered divers and established hardened steel models from brands operating in the $5,000 to $7,000 range. The value proposition relies heavily on the integration of the manufacture movement, the proprietary DLC coating, and the 500-meter depth rating.

Both models are supplied in the Fortis Alpha Box packaging system. The delivery set includes all necessary paperwork, comprising the comprehensive 5-year manufacture warranty, the individual COSC Chronometer Certificate verifying the specific movement's performance, and the user manual. Additionally, the package includes a high-quality reversible screwdriver, specifically sized to interface with the screw pin mounting system, allowing the owner to execute secure strap changes without requiring specialized bench tools.

Technical Specifications

Case: 44mm diameter (48mm lug-to-lug, 14mm height), Recycled Stainless Steel with Dianoir DLC Coating (Gravity Black features standard stainless steel case back), Bidirectional Gear Bezel with Fortis Lock System, Triple Gasket Screw-Down Crown

Movement: Automatic Manufacture Calibre Werk 11 (Kenissi), COSC-certified chronometer, Variable Inertia Regulation, Traversing Balance Bridge

Dial: Black with Fortis O-pattern, Applied Superluminova X1 markers. Black Resin: Metallic Golden hands. Gravity Black: Metallic hour hand, Orange minute hand

Strap: Black Horizon Strap in Hypoallergenic FKM rubber, DLC Coated Stainless Steel Pin Buckle, Screw Pin System

Price: $5,450.00

Reference Number: Marinemaster M-44 DLC Black Resin F8120031 / Marinemaster M-44 DLC Gravity Black F8120030

Notes: 500m / 50atm water resistance, Sapphire crystal with dual-sided anti-reflective coating, 70-hour power reserve, Delivered with Alpha Box and reversible screwdriver