Spotting Fake IWC Portugieser IW500705 & IW371446 Watches

The IWC Portugieser is a timeless classic, renowned for its elegant design and precise engineering. However, its popularity has also made it a target for counterfeiters. The IW500705 and IW371446 models are particularly sought after, making them prime candidates for imitation. With the genuine articles costing several thousand pounds, the stakes are high for collectors and enthusiasts. The counterfeit market for these models is unfortunately thriving, with fakes becoming increasingly sophisticated. This guide will arm you with the knowledge needed to distinguish a genuine IWC Portugieser from a fake, focusing on the specific details unique to these references.

Movement Calibre Verification

The IW500705 is equipped with the IWC-manufactured calibre 52010, while the IW371446 houses the calibre 79350. A genuine 52010 features a Pellaton automatic winding system with ceramic components, visible through the transparent caseback. The calibre 79350 is based on the ETA 7750 but is heavily modified by IWC. Look for precise finishing, including Côtes de Genève and perlage decoration. Counterfeit movements often lack this level of detail and may use generic, unmodified movements.

Dial Printing and Markers

Examine the dial closely; genuine IWC Portugieser models have impeccably printed numerals and markers. The IW500705 features a power reserve indicator and a date window, while the IW371446 has a chronograph function with sub-dials. The printing should be sharp, with no bleeding or misalignment. The sub-dials should be perfectly centred and aligned. Counterfeit dials often have uneven printing and sub-dials that are slightly off-centre.

Caseback and Engravings

The IW500705 has a transparent sapphire caseback, allowing a view of the movement, whereas the IW371446 has a solid caseback. Genuine casebacks will have precise engravings, including the IWC logo and model reference. The engravings should be deep and clean, not shallow or rough. Fake watches often have poorly executed engravings that can appear faint or uneven.

Bracelet and Clasp

The IW500705 typically comes with an alligator leather strap, while the IW371446 may feature a stainless steel bracelet. Genuine IWC straps and bracelets are of high quality, with a smooth finish and precise stitching. The clasp should have a solid feel, with the IWC logo crisply engraved. Counterfeit straps often use inferior leather or metal, and the clasps may feel flimsy or have poorly executed logos.

Weight and Sound

Authentic IWC Portugieser watches have a substantial weight due to their high-quality materials. The IW500705, with its larger case and automatic movement, will feel heavier than the IW371446. When handling the watch, listen for the sound of the rotor; it should be smooth and quiet. Counterfeit watches may feel lighter and produce a louder, less refined sound when the rotor moves.

Lume Colour and Application

The lume on a genuine IWC Portugieser should be evenly applied and emit a consistent glow. The lume colour is typically a soft green or blue, depending on the model. Check that the lume is applied precisely within the markers and hands, with no overflow. Fakes often have uneven lume application, and the glow may be inconsistent or fade quickly.

Red Flags at a Glance

• Misaligned sub-dials
• Shallow or uneven engravings
• Inferior quality leather or metal straps
• Loud rotor movement
• Inconsistent lume glow

FAQ

What movement does the IW500705 use?

The IW500705 uses the IWC-manufactured calibre 52010, featuring a Pellaton automatic winding system.

How can I verify the authenticity of the dial?

Check for sharp printing, aligned sub-dials, and precise marker placement. Any misalignment or bleeding is a red flag.

What should I look for in the caseback engravings?

Look for deep, clean engravings of the IWC logo and model reference. Shallow or rough engravings are signs of a fake.

Final Word

Authenticating an IWC Portugieser IW500705 or IW371446 requires attention to detail and knowledge of the brand's craftsmanship. While this guide provides essential checks, consulting with a professional watchmaker or authenticator can offer additional peace of mind. Remember, investing in authenticity is crucial to preserving both the value and the legacy of your timepiece.

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