IWC - Caliber 8531 '18K yellow gold' - No reserve price - 57115 - Men - 1960-1969

Presented for auction by Second Vintage

This solid 18K yellow gold vintage IWC is a highly sought-after collector favourite, distinguished by its distinct faceted lugs and the legendary Caliber 8531 movement. Vintage solid gold IWCs equipped with the 853x series movements are highly regarded for their robust engineering and classic design, making this heavily patinated example a compelling find for enthusiasts of mid-century Swiss watchmaking.

Brand: IWC
Reference Number: 57115
Serial Number: 1699924
Movement: Automatic Caliber 8531, 21 Jewels
Dial: Heavily patinated with applied gold-tone faceted indices
Case Size: 35mm (excluding the crown)
Case Material: 18K yellow gold
Production Year: 1960s
Condition: Good vintage condition. Timegrapher: +3+5s/day, performing remarkably well.

Dial and Hands
The dial presents a heavily patinated character, exhibiting heavy spotting and patina across the entire surface. It features applied gold-tone faceted indices and a neatly framed date window at 3 o'clock. Despite the significant aging, the print reading "International Watch Co SCHAFFHAUSEN AUTOMATIC SWISS" remains entirely intact. The gold-tone dauphine style hands display light oxidation and spotting consistent with the dial's age, creating a matching patina.

Case and Crystal
The 18K yellow gold case is defined by its distinct faceted lugs and a smooth integrated bezel. It displays honest wear with preserved geometry, showing light scratches and handling marks throughout the gold surfaces. The hallmarks remain clearly visible on the caseback exterior. The knurled crown is unsigned. The domed acrylic crystal is clear, exhibiting only light surface wear.

Movement
Powering this timepiece is the in-house automatic Caliber 8531. The movement maintains a clean appearance, with the renowned Pellaton winding system clearly visible and only light superficial marks present on the rotor. The caliber bears crisp engravings reading INTERNATIONAL WATCH Co SWISS, 21 JEWELS, PAT. APPL., C.8531, alongside the serial number 1699924. Timegrapher results show +3+5s/day. Exhibiting remarkable accuracy and consistency, performing brilliantly for a vintage timepiece.

Strap
The watch is fitted with a lightly worn black leather strap featuring contrast stitching and a buckle.

Condition
Good vintage condition. The 18K yellow gold case shows honest wear with preserved geometry, bearing light scratches and handling marks, while maintaining clear caseback hallmarks. The dial and hands are heavily patinated, showing significant spotting and oxidation across their surfaces. The domed acrylic crystal has light surface wear. The movement is visually clean with minor superficial marks on the rotor.

Dimensions
35mm (excluding the crown)

Remarks
This IWC offers a striking combination of a solid 18K yellow gold case with distinct faceted lugs and a beautifully aged dial. Driven by the in-house automatic Caliber 8531 featuring the renowned Pellaton winding system, it delivers robust mechanical performance wrapped in classic vintage styling.

History
Introduced in 1958 and remaining in production until 1964, the IWC Caliber 8531 is a highly respected 21-jewel automatic movement operating at 19,800vph. It was engineered with a Breguet hairspring, Reed's regulator, and a 44-hour power reserve. Vintage solid gold IWCs equipped with the 853x series movements are highly regarded by collectors for their robust engineering and classic mid-century design, ensuring references like the 35mm 57115 remain a celebrated part of the brand's mechanical legacy.

Payment and Shipping
Payment must be completed within 1–3 days after purchase.
Your watch will be professionally and securely packaged, then shipped with tracking and insurance for your peace of mind.
We use fast express shipping, with typical delivery within 1–4 business days, depending on the destination.
Please note that vintage watches may show minor signs of wear, aging, or imperfections, which are considered normal for watches of this age.
We kindly ask you to review all photos carefully before bidding. We photograph each watch from multiple angles to provide the most accurate representation possible, and the photos form an important part of the description.
The timegrapher assessment if provided is seen as an indication of the movement’s condition under fully wound testing conditions. As with all vintage watches, results may vary in daily use.
If you have any concerns regarding functionality or defects after delivery, please contact us within 3 days of receiving the watch so we can assist you.
As with all used watches, water resistance is not guaranteed.
If you have any questions, feel free to contact us after the auction ends.

/ Second Vintage

SKU: IWC-IWX-0003