SKU: 93389029960

IWC Ingenieur Chronometer Automatic Black Dial Anti Magnetic Ref 3521 from 1990s

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Description

IWC Ingenieur Chronometer Automatic Black Dial Anti Magnetic Ref 3521 from 1990sIWC Ingenieur Automatic Ref. 3521 Genta Designed Steel Sports Watch A compelling fusion of technical purity and iconic design, the IWC Ingenieur Ref. 3521 holds a quietly prestigious place in sports watch history. Designed by the legendary Grald Genta and crafted for function first durability, this model is a refined expression of antimagnetic engineering in an everyday luxury package. Design & Legacy Gentas Quiet Masterpiece Grald Gentarenowned for

IWC Ingenieur Automatic Ref. 3521 – Genta-Designed Steel Sports Watch

A compelling fusion of technical purity and iconic design, the IWC Ingenieur Ref. 3521 holds a quietly prestigious place in sports watch history. Designed by the legendary Gérald Genta and crafted for function-first durability, this model is a refined expression of anti‑magnetic engineering in an everyday luxury package.

Design & Legacy – Genta’s Quiet Masterpiece

Gérald Genta—renowned for the Royal Oak, Nautilus, and many other icons—lent his influential design language to IWC's Ingenieur series in the 1970s. The early Ingenieur SL (“Steel Line”) models featured bold cases with screwed bezels, integrated H‑link bracelets, and structured dials that firmly asserted their technical character.

By the early 1990s, IWC introduced the 34 mm Ref. 3521—deliberately more wearable than its “Jumbo” predecessor yet no less substantial in engineering. It remains the only chronometer-certified—or COSC—model of the Ingenieur line.

Technical Prowess – Chronometer & Anti-Magnetic Protection

The Ref. 3521 is officially certified as a chronometer, ensuring precision at the pinnacle of mechanical regulation. Its anti‑magnetic resistance reaches up to 40,000 A/m (~500 gauss)—more than meeting the ISO 764 standard (4,800 A/m) for magnetic‑resistant watches.

Inside, it houses the rugged IWC caliber 887/2—based on Jaeger‑LeCoultre’s 889—complete with a robust automatic winding system, a solid platinum rotor, and approximately 38 hours of power reserve.

A Tribute in Steel – Refined Yet Bold

With a case size of 34 mm, the Ingenieur Ref. 3521 avoids oversized showroom appeal and instead offers refined presence—balancing vintage-correct proportions with modern wearability. Constructed in stainless steel, often with matching integrated bracelet, it has a discreet yet assured visual identity .

Rarity, Appreciation & Collector Value

Though quietly launched and never reaching the fame of Genta’s Royal Oak or Nautilus, the Ref. 3521 has become something of a sleeper classic. Its rarity, precision certification, and Genta pedigree have made black‑dial variants—like the one we’re discussing—especially sought after among enthusiasts.This Example – Detailed Overview

Condition & Performance

  • Movement Performance: Running exceptionally well, keeping excellent time at +3 seconds/day, with 0.0 ms beat error and 320° amplitude—signifying a well-tuned movement.

  • Case & Bracelet: Honest vintage condition; light signs of wear on the steel case that attest to its genuine age and use. Bracelet measures 18 cm—ideal for many wrists.

  • Crystal & Dial: Sapphire glass remains clear and unmarked. The black dial shows minor imperfections consistent with age, giving it authentic character without detracting from legibility or elegance.

  • Design Accents: Golden details on the black dial enhance its depth and aesthetic appeal.

Key Details:

  • Reference: IWC Ingenieur Automatic Ref. 3521 (1990s)

  • Designer: Gérald Genta

  • Movement: IWC Caliber 887/2 Automatic (based on JLC 889), Chronometer-Certified

  • Anti-Magnetic: 40,000 A/m (~500 gauss)

  • Case Size: 34mm

  • Case Material: Stainless Steel with Integrated Bracelet

  • Crystal: Sapphire Glass

  • Dial: Black with Golden Accents, Minor Vintage Imperfections

  • Hands: Luminous Baton Hands

  • Crown: Screw-Down, Signed IWC

  • Bracelet Length: 18cm

  • Condition: Honest vintage; well serviced, strong amplitude, clear sapphire

Why This Watch?

The IWC Ref. 3521 is a rare blend of Genta design, technical rigor, and wearability. It embodies IWC’s heritage of anti-magnetic innovation—originally borne from mid-century scientific demands—combined with visual DNA from one of watchmaking's most influential designers. This elegant sport watch offers COSC-certified precision in a sleek, understated form that appeals to both collectors and daily wearers.

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SKU: 93389029960

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Nurse Jesica
Port Orchard, US
★★★★★ 5
My Heels Were in Bad Shape. Like… Really Bad
Color: Gray
These moisturizing heel socks with the gel cushions were honestly a small miracle for me. After recovering from cancer treatments, my skin became extremely dry everywhere, but my heels were the worst. They cracked so deeply they looked like fissures and were even bleeding. I tried lotions and bandages repeatedly with very little progress. A friend suggested I treat my heel like it might have a fungal component, so I applied Lotrimin cream, put these heel socks on, and hoped for the best. Within three days, my heels were fully healed. I completed a 7-day routine, and my feet have never been softer. The silicone gel cushion is comfortable, soothing, and stays in place. I loved it so much that I still treat myself about once a week, even though I really don’t need to anymore. They are also washable. I hand-washed mine in the sink and let them air dry, and they came out looking brand new. If your heels are cracked, painful, or need serious care, I highly recommend these.
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Reviewed in the United States on January 9, 2026
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Becky
Draper, US
★★★★★ 5
Work well on hubby's heals
Color: Gray
Dr recommended these for hubby's dry cracked heals
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Reviewed in the United States on May 9, 2026
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Misha
Birmingham, US
★★★★★ 3
Ehh. Not for me.
Color: Gray
Foot slides when walking in them. The fit was tighter than lead to believe. It did hold the moisture in but the silicone patch is small
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Reviewed in the United States on February 23, 2026
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Secret Angel
Phoenix, US
★★★★★ 5
Transformative for Dry, Cracked Heels!
Color: Original Grey
I recently purchased Dr. Frederick's Original Moisturizing Heel Socks, and they have truly transformed the condition of my feet! I can’t recommend them highly enough. Effective Moisturization: These socks are infused with moisturizing agents that work wonders. After just a few uses, I noticed a significant reduction in dryness and cracking on my heels. My feet feel softer and smoother, and I love that I can wake up to beautifully moisturized skin. Comfortable Fit: The socks are incredibly comfortable to wear, with a snug yet gentle fit. I appreciate that they don’t feel restrictive, allowing me to walk around my home while wearing them without any discomfort. They are also lightweight, making them easy to slip on before bed. User-Friendly: They are super easy to use—just wear them overnight, and let the socks do their magic. I love the simplicity of incorporating them into my nighttime routine. Durable Quality: The quality of the socks is impressive. They wash well and have maintained their shape and effectiveness after multiple uses. I feel confident that they will last a long time. Final Thoughts: If you're struggling with dry, cracked heels, I highly recommend Dr. Frederick's Original Moisturizing Heel Socks. They are a fantastic investment in foot care and have made a noticeable difference in the health of my skin. These socks have become a must-have in my self-care routine!
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Reviewed in the United States on October 4, 2024
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Donna
West Palm Beach, US
★★★★★ 5
These worked for me!
Color: Original Grey
They worked great. I bought these for cracked sore heels. It took 2-3 weeks but my heels no longer hurt and the cracks have closed and look more like an indention than a crack now. They feel so much better, but I'll probably wear them another week just to be sure they stay healed. They look and feel like regular socks from the outside but only cover the heel with the toe open. Not think but not thick, again like regular socks. They would probably be slippery on a smooth surface the same as socks. The inside feels like rubber or something smooth at the heel. I have washed them once each pair and accidentally dried one pair in the dryer. They still seem to feel the same so I think they're fine. They're pretty inexpensive and had different colors and sizes.
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Reviewed in the United States on February 10, 2026

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