This replica classic fusion 0170 in reference 525.NX.0170.LR places the Aerofusion skeleton chronograph inside a titanium case from Hublot’s Classic Fusion line. The 525 reference series identifies this as an Aerofusion variant, where the dial plate is partially removed to expose the chronograph mechanism underneath. At 45mm the titanium case keeps weight manageable despite the generous diameter, and the “LR” strap code specifies a leather band with deployant clasp. The skeleton layout offers mechanical visibility that solid-dial chronographs in the 521 series cannot provide.

Technical Overview

• Reference: 525.NX.0170.LR
• Case diameter: 45mm
• Case material: titanium
• Dial: skeleton/open-worked (Aerofusion)
• Crystal: sapphire
• Strap: leather with deployant clasp
• Movement: automatic Aerofusion chronograph
• Functions: hours, minutes, chronograph, date

The Aerofusion name combines “Aero” for the skeletonized dial architecture with the brand’s founding “Fusion” material philosophy. The chronograph bridges and plates are visible through the dial opening, and hour markers float on a sapphire ring above the exposed movement elements.

Inside the Movement

The Aerofusion chronograph caliber uses a self-winding architecture with chronograph registers partially integrated into the visible movement plate. The layout differs from standard three-register chronographs because the skeleton cutaways reshape how the subdials read visually. Date display sits at three o’clock. Power reserve runs in the 42-hour range. The chronograph pusher action at two and four o’clock starts and resets the timing function. For a completely different material take on this same Aerofusion layout, the blue 541.NX.7170.LR drops the chronograph for a simpler three-hand approach. Both belong to the Classic Fusion lineup and share titanium construction.

What Sets It Apart

The titanium Aerofusion occupies the middle position in the 525 material range. Below the King Gold 525.OX and above the steel variants, titanium offers the most practical daily-wear balance between weight, durability, and visual refinement. The skeleton dial means no two angles present the same view, since light passes through the cutaways differently as the wrist moves. Leather strap keeps the overall tone refined rather than sporty. This replica classic fusion 0170 delivers the Aerofusion concept in its most wearable material format for those who prioritize both visual depth and lightweight comfort.