Chronoswiss CH 7521 Opus 18K Yellow Gold (24465)

24465 Chronoswiss 7521 Opus Chronograph, CH 7521, CH-7521, CH7521, 18k yellow gold on a strap, automatic movement, 12 hour chronograph, date at 3 o clock, completely skeletonized dial where you can see the entire movement and its beautiful finish, blue steel hands, display back, sapphire crystal, diameter: 38mm, thickness: 14mm, Like New with original box and papers that are undated.

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More about Chronoswiss Reference No. CH 7521

This is an 18K yellow gold Chronoswiss Opus Chronograph, CH 7521 has an exhibition screwed down sapphire display case back, and round chronograph pushbuttons. The 38mm diameter solid three-body case, downturned lugs, gold screwed bars, cupped coin edged bezel and case back are polished. The dial is completely skeletonized with blued steel Breguet hands, a center chronograph hand, and an outer 1/5 seconds scale. There is a subsidiary ring dial for the days of the month at the 3 o'clock position, a 12-hour register at 6 o'clock, and a 30-minute sub dial at 12 o'clock. There is a constant small seconds ring at 9. It's water resistant to 30 meters/100 feet, and the 14mm thick case, dial, and movement are all signed.

The mechanical automatic self-winding Chronoswiss caliber 741S movement is gilt and it's skeletonized with oeil-de-perdrix embellishment. It's constructed with 23 jewels, and a shock absorber mechanism. It has a straight-line lever escapement, a monometallic balance that's adjusted for temperature and 5 positions, and a self-compensating flat balance spring. It includes a micrometer regulator, a gold rotor, and a precision adjustment for the regulator pin.