M+ Factory IWC Big Pilot’s Watch 43 Spitfire Titanium (IW329701)
The definitive Grade 5 Titanium field watch replica, capturing the rugged military aesthetic of the Spitfire with precision engineering.
Powered by Miyota 9015 (Decorated to Cal. 82100)
To ensure the slim profile and reliability required for a daily beater, M+ Factory utilizes the Japanese Miyota 9015 movement. It is heavily modified with decorative bridges and a rotor to visually mimic the IWC Calibre 82100.
- ✅ Power Reserve: Approx. 42 Hours (Real-world usage).
- ✅ Functionality: Center seconds, hacking seconds (stop-seconds) for precise time setting.
- ✅ Reliability: High-beat 28,800vph frequency ensures a smooth sweep and superior shock resistance compared to cloned 7-day movements.
Technical Specifications
THE BUILD
Grade 5 Titanium
Full sandblasted titanium case construction. Lightweight, hypoallergenic, and highly resistant to corrosion, matching the darker grey tone of the Genuine perfectly.
THE FACE
Matte Black & Faux Patina
The dial features a distinct matte finish to reduce glare. The numerals and indices are applied with beige Super-LumiNova to simulate the vintage military aesthetic.
THE BEZEL
Fixed Titanium
Seamlessly integrated into the case architecture with precise finishing that eliminates sharp edges, typical of high-tier M+ production.
REFINEMENT
EasX-CHANGE System
Functional quick-change strap system allowing you to swap the brown calfskin leather strap without tools, identical to the proprietary IWC mechanism.
🏆 Why We Chose M+ Factory for this Model?
Many clients ask: “Why not ZF (Z Factory)?”
Here is the honest truth: While ZF is a giant in the IWC space, M+ Factory wins in terms of Case Finishing and Crown Tube construction for the Titanium models. ZF versions often have a slightly lighter, “steely” hue to the titanium, whereas M+ nails the darker, gunmetal matte grey of the authentic Spitfire. Additionally, M+ has refined the “EasX” strap mechanism to be smoother than the ZF counterpart.
Full Disclosure: Because this uses a Miyota 9015, the unidirectional rotor can be slightly audible in a dead-silent room (the famous “Miyota whirl”). This is not a defect, but a characteristic of this reliable movement architecture.
Data Sheet
| MODEL REFERENCE |
IW329701 (Spitfire) |
| FACTORY / VERSION |
M+ Factory (V2 Updated) |
| MOVEMENT |
Miyota 9015 Automatic (Decorated) |
| CASE MATERIAL |
Grade 5 Titanium (Matte) |
| CRYSTAL |
Sapphire with Double AR Coating |
| DIMENSIONS |
43mm Diameter x 14.4mm Thickness
(Manual measurements may have slight discrepancies.) |
Common Questions about the IWC Spitfire
Q: Is this M+ Factory version waterproof?
A: Out of the box, it is sealed for basic daily use (splash/rain proof) and features a screw-down crown. However, we strongly recommend a professional pressure test before swimming, as this is a replica.
Q: How does the movement compare to the Genuine 82100?
A: The genuine uses a Pellaton winding system with 60 hours power reserve. The M+ uses a Miyota 9015 (42 hours). While the power reserve is shorter, the Miyota is incredibly durable, cheaper to service, and the aesthetic decoration makes it look very close to Gen through the caseback (though this model has a solid titanium back usually, shielding the movement entirely).
Q: What is the biggest difference compared to Gen?
A: Under macro lens, the finishing on the hands may show extremely minor roughness compared to IWC’s laser precision. However, the biggest tell on lower-end reps is the titanium color; M+ has solved this by achieving the correct dark grey tone.
🛡️ Our “No-Lemon” Guarantee
- Actual QC: You will receive high-res QC photos and timegrapher videos of your specific watch before we ship.
- Customs Safe: We use triangular shipping methods to ensure safe delivery to the US/EU/UK.
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