2018 IWC Portofino Automatic 37 Watch IW458101 Date Diamond Silver-Tone Dial B&P

Watch Overview

Offered here is a highly collectible IWC Portofino Automatic 37 wristwatch, reference IW458101, dated from 2018. This example comes complete with its original box and papers.

Powered by the IWC caliber 35111 automatic movement, this Swiss-made timepiece features a sweep seconds hand, hacking seconds, and a date display. It operates at 28,800 vph and offers an approximate 50-hour power reserve.

Housed in a 37mm round stainless steel case with a fixed smooth bezel, it features a convex sapphire crystal with anti-reflective coating on both sides. Water-resistant to 30 meters (3 bar).

The sunburst silver dial is elegantly designed with applied gold-tone Roman numerals at 6 and 12 o’clock, stick hour markers set with diamond accents, and matching gold-tone hands. A date window is positioned at 3 o’clock.

This example is fitted with the original IWC stainless steel mesh band with signed clasp, and includes an additional non-original brown leather two-piece strap.

Fully inspected and authenticated by our in-house watchmaker, this timepiece is running properly and ready to wear and enjoy.

Product Details

General Specifications

• Brand: IWC
• Type: Wristwatch
• Model: Portofino Automatic 37
• Reference: IW458101
• Year / Era: 2018 – Modern
• Gender: Men's
• Country of Manufacture: Switzerland

Dial & Display

• Display: Analog
• Color: Silver
• Features: Roman numerals, diamond-set hour markers, sweep seconds, date display, minute track

Movement

• Type: Automatic
• Caliber: IWC 35111
• Jewels: 25
• Movement Functions:
  • Sweep seconds
  • Hacking seconds
  • Date display
• Power Reserve: Approx. 50 hours
• Frequency: 28,800 vph

Case & Band

• Material: Stainless steel
• Case Shape: Round
• Bezel: Fixed, smooth
• Crystal: Sapphire, anti-reflective coating
• Back: Screw
• Crown: Signed IWC crown
• Water Resistance: 30 meters / 3 bar
• Band Type: Original stainless steel mesh band
• Case Back Markings: International Watch Co. Portofino, 3 BAR, 5537891

Case Measurements (mm)

• Case Size: 37
• Case Thickness: 9.2
• Lug Width: 18

Additional Info

• Box & Papers: Yes – includes original box, warranty card, manuals, and accessories as shown
• Condition: Very good condition with light signs of wear consistent with careful use
• Notes: Fully inspected and authenticated by our in-house watchmaker, confirming proper operation.

History & Legacy of IWC

Founded in 1868 by American watchmaker Florentine Ariosto Jones, IWC was built around a simple but ambitious idea: bringing together American industrial efficiency and traditional Swiss craftsmanship.

Over the years, IWC earned a strong reputation for producing precise, purpose-built tool watches — especially pilot’s watches. One of the brand’s most historic contributions came during the 1940s, when IWC produced the legendary oversized “B-Uhr” navigation watches, now considered some of the most iconic military aviation timepieces ever made.

About Second Hand Horology

At SECOND HAND HOROLOGY, we offer a curated selection of watches ranging from vintage to modern, including both brand-new and pre-owned timepieces. We are committed to quality, accuracy, and integrity. Our listings feature professional, unedited photography and clear, transparent descriptions.

Every watch is thoroughly inspected and securely packaged to ensure a confident and seamless buying experience. We warmly invite you to visit our physical shop and explore the collection in person.

Contact Us

We appreciate you checking out our listing! Don’t hesitate to reach out with questions, offers, or simply to talk watches — we truly enjoy connecting with fellow enthusiasts.

Thank you for your business. We genuinely appreciate your support and look forward to serving you again in the future.

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