This replica classic fusion 0170 black pairs a ceramic case with Hublot’s Aerofusion skeleton chronograph architecture in reference 525.CM.0170.RX. The “CM” in the reference designates ceramic material throughout, giving the entire case a lightweight, scratch-resistant surface that standard steel cannot match. At 45mm the Aerofusion sits in the larger segment of the Classic Fusion family, balancing the visual openness of a skeletonized dial against the dark, monochromatic ceramic construction. The black dial treatment lets the chronograph bridges and movement architecture show through without overwhelming the readability of the time display.

Key Specifications

• Reference: 525.CM.0170.RX
• Case diameter: 45mm
• Case material: black ceramic
• Dial: skeleton/open-worked black
• Crystal: sapphire
• Strap: black rubber
• Movement: automatic chronograph (Aerofusion)
• Functions: hours, minutes, chronograph, date

Ceramic as a case material brings the weight down noticeably compared to steel or gold versions in the same 45mm diameter. The surface also resists hairline scratches from daily wear, maintaining its factory finish longer than metallic alternatives.

Design & Finishing

The Aerofusion concept strips away the solid dial plate to expose the chronograph mechanism underneath. On this black ceramic version, the exposed bridges and plates are finished in dark tones that blend with the case, creating a stealth aesthetic where movement and case merge visually. The classic fusion chronograph titanium models in the same 525 series use a silver-toned approach instead. For a gold-cased take on the Classic Fusion chronograph, consider the 521.CO.1781.RX in gold with carbon dial. Both share the same Classic Fusion collection DNA but target opposite ends of the color spectrum.

On the Wrist

The 45mm ceramic case wears lighter than its diameter suggests. Ceramic density sits below steel, so despite the generous proportions the watch does not pull or slide on the wrist. The rubber strap complements the all-black approach, and the deployant clasp keeps the profile low against the skin. This replica classic fusion 0170 black delivers the Aerofusion skeleton concept in its most understated material configuration.