Fratello × Straum Jan Mayen Titanium Limited Edition
Fratello × Straum Jan Mayen Titanium Limited Edition
Case construction
Grade 5 Titanium. Elevated.
Crafted in Grade 5 titanium, the 39mm case offers a superior strength-to-weight ratio, combining lightweight durability with refined finishing—bead-blasted surfaces, polished highlights, and crisp edge transitions.
Integrated quick release
The Straum Coupling
Machined from the same Grade 5 titanium, the Straum Coupling integrates a push-button quick-release system for fast, tool-free strap changes—seamlessly housed within our signature midlink.
Precision-Moulded for Fit and Airflow
FKM Rubber Straps
The FKM strap integrates seamlessly into the case via the Straum Coupling. Its curved tip follows the wrist’s natural shape, while the raised profile improves ventilation. It’s paired with the Straum buckle, machined from Grade 5 titanium.
Capturing nature
The Lava Red Dial
The movement
LJP G101
The Jan Mayen Titanium uses the LJP G101 by La Joux-Perret—an automatic, dateless movement with a 68-hour power reserve. Graded Soigné and adjusted in four positions, it’s visible through a sapphire screw-down caseback.
| Reference | WATCH-JANMAYEN-CPL-02-TI5-FRATELLO-39-BRACELET-TI5-MAQR |
Watch
| Certification | Swiss Made |
| Diameter | 38.7mm. |
| Case width | 40.7mm (direction 9 to 3 including crown). |
| Thickness | 11.5mm (9.7mm excluding the crystal). |
| Lug tip to lug tip | 45.7mm (seen from side). |
| Drilled lug hole center-to-center | 42.5mm (seen from side). |
| Lug width | 24.8mm (seen from top) |
| ATM Rating | 10 ATM. |
| Crown | Screw-down, with manual winding. |
| Bezel | Grade 5 Titanium. Bead-blasted with polished accents. |
| Caseback | Screw-down. Grade 5 Titanium. Bead-blasted with polished accents. Sapphire crystal window. |
| Crystal | Double-domed scratch-resistant sapphire crystal with internal anti-reflective coating. |
| Dial | Custom designed patterns embodying the landscape of Jan Mayen. Stamped in multiple stages with increasing detailing and fidelity. Treated and painted in several stages, including fumé. Indices filled with Swiss Super-LumiNova Grade A. |
| Hands | Diamond-cut and filled with Swiss Super-LumiNova Grade A. |
Movement
| Manufacturer | Manufacture La Joux-Perret S.A. |
| Model | LJP G101 (no date position). |
| Functions | Time only. |
| Grade | Soigné, adjusted to four positions (CH, 3H, 6H, 9H). |
| Jewels | 24 jewels. |
| Power reserve | 68 hours. |
| Middle rate | 7 ±7 s/d. |
| Max. divergence all positions | 20 s/d. |
| Isochronism | ±15 s/d. |
Straum Coupling
| Materials | Grade 5 Titanium or Stainless Steel. |
| Finishing | Bead-blasted and polished in Grade 5 Titanium. Brushed and polished in Stainless Steel. |
| Case attachment | Spring bar. |
| Strap attachment | Quick release system engaged with a button. |
Straum Rubber Straps
| Material | FKM fluoroelastomer rubber. |
| Design | Custom curved flared tip follows wrist curvature, eliminating bulk. Raised profile ensures ventilation and comfort in warm conditions. |
| Dimensions | Tapers from 24.8mm lug width to 18mm at the buckle. |
| Colors | Black, White, Beige, Grey, Yellow, Dark Blue, and Dark Green. |
| Sizing | Three cut-to-size positions on the short side, allowing for a tailored fit. |
| Maximum wrist circumference | 21cm. |
Straum Buckle
| Materials | Grade 5 Titanium or Stainless Steel. |
| Finishing | Bead-blasted and polished in Grade 5 Titanium. Brushed and polished in Stainless Steel. |
| Strap attachment | Spring bar. |
Grade 5 Titanium Bracelet
| Material | Hardened Grade 5 Titanium, minimum 1200 Vickers. |
| Design | Custom designed and manufactured Grade 5 Titanium with a tapered shape across the first five links. |
| Manufacturing | CNC machined to very high tolerances and machine-finished to ensure highly precise separation of surface finishings. Inside edges are chamfered and polished to ensure a very comfortable wearing experience with no pinching. |
| Finishing | Bead-blasted with polished accents, matching the Grade 5 Titanium case. |
| Dimensions | Tapers from 24.8mm lug width to 18mm at the clasp. |
| Construction | Pin and collar. Sizing tools included. |
| Adjustments | Two 130% links included to allow for a precise and tailored fit, plus the integrated micro-adjust clasp. |
| Case attachment | Quick release system engaged with a button. |
| Clasp | Machined butterfly deployant with push buttons, with the Straum micro-adjust system integrated as standard — enclosed ratchet, 4mm of adjustment in total (2mm per side across 3 positions). Grade 5 Titanium with bead-blasted, brushed and polished surfaces matching the bracelet. Attached with pin and collar. |
Manufacturing process
We carefully sculpt every dial detail in CAD software and then CNC machine a series of stamping tools with increasing fidelity. These are then used to stamp brass blanks in multiple stages, adding finer and finer details. Next, we apply multiple coatings, lacquers and fumés to establish depth and dimension. A final layer of clear coat is polished to a glass-like finish, resulting in a truly captivating visual experience. The applied logo and indices ensure contrast and legibility, while the ultra-sharp diamond-cut hands complement the intricately finished watch case. Additionally, all elements are coated with applied Super-LumiNova BGW9 for optimal visibility.