Technical Archive

Chopard
Classic Racing 158457-3002— lug 23mm

Chopard Classic Racing 158457-3002: 23mm strap. Alligator, box calf, shell cordovan and rubber, cut and stitched in Milano. Choose your leather.

Mille Miglia Gran Turismo XL Power Control White / Bracelet

Artisanal Note

"This model requires a precise 23mm lug width to preserve the original sartorial balance."

Technical Specifications

Chopard 158457-3002
Lug Width
23 mm

The essential strap measurement.

Browse 23mm straps →
Reference

158457-3002

Movement

ETA caliber A07.211 Hours, Minutes, Seconds | Date | Chronograph

The Heritage

The Chopard Classic Racing 158457-3002 is a 44mm stainless steel sports chronograph born from Chopard's passion for historic motorsport and the legendary Mille Miglia races. It features an ETA calibre A07.211 movement with hours, minutes, seconds, date and chronograph functions. The 23mm lug width is a deliberate engineering choice that ensures harmonious proportions on the wrist while maintaining suspension integrity, requiring careful selection of compatible straps.

FAQ

What is the exact lug width of the Chopard Classic Racing 158457-3002?

The Chopard Classic Racing 158457-3002 features a lug width of 23mm, a non-standard measurement in watchmaking. This requires specifically sized straps. To verify compatibility, measure the distance between the inner edges of both lugs using a digital calliper.

Which strap material is recommended for the Chopard 158457-3002?

For the Chopard Classic Racing 158457-3002, recommended materials include alligator for discreet luxury, vegetable-tanned calf for vintage-racing authenticity, FKM rubber for intensive sporting use, and mercerised cotton NATO for practical strap changes. Your choice depends on primary use and aesthetic preference.

How do I safely change the strap on my Chopard Classic Racing?

To change the strap, use a spring bar removal tool or consult a qualified watchmaker. Place the watch on a soft surface to prevent scratches, position the tool perpendicularly to compress the spring mechanism, gently extract the old strap, and repeat for the opposite side. 23mm-compatible straps insert with uniform pressure until you hear a click.

Can I fit an aftermarket strap on a Chopard Classic Racing 158457-3002?

Yes, but the strap must be specifically manufactured for 23mm lugs. Straps of different widths (22mm or 24mm) create undesirable play or mounting issues that compromise aesthetic stability and lug longevity. Always verify technical specifications before purchase.

What is the expected lifespan of a leather strap on the Chopard Classic Racing?

A quality leather strap (alligator, calf, cordovan) on a Chopard Classic Racing typically lasts 3-5 years with daily wear. Longevity depends on: frequency of use, UV and moisture exposure, periodic maintenance with neutral wax, tanning quality, and stitching calibre. Casati Milano straps include an 18-month warranty.

The next step

The right strap isn’t chosen. It is built, together.

From the atelier appointment to delivery, every step is made for those who know that things done well take time. Rare leathers, one piece at a time, eighteen months of warranty.

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The atelier's website: casatimilano.com