Frederique Constant · Slim Line

Strap for Slimline Mini Yellow Gold / Silver / Bracelet

Takes 12 mm straps. Verified lug width, the straps that fit this model, and answers to the most common questions.

Lug width12 mm
Case diameter25 mm
ReferenceFC-200MCS5B
FamilySlim Line
MovementFrederique Constant caliber FC-200 Hours, Minutes
CaseStainless Steel

Spring bar

Swiss Standard universal spring bars

The right category for this model · 316L steel, all lug widths 13–26 mm

The Slim Line FC-200MCS5B, seen from the bench

The Frederique Constant Slim Line FC-200MCS5B is a contemporary interpretation of watchmaking elegance with a 25mm stainless steel case and minimalist design. Powered by the Frederique Constant caliber FC-200 quartz movement, it features hours and minutes display without seconds. The 12mm lug width is a specific dimension reflecting historical European women's watch standards, requiring precise strap selection to ensure proper fit and security.

Frequently asked questions

What is the lug width of the Frederique Constant Slim Line FC-200MCS5B?

The lug width (also known as strap width) of the Frederique Constant Slim Line FC-200MCS5B is 12mm. This dimension requires straps specifically designed for this width, as it does not correspond to common standards such as 14mm, 16mm or 18mm. Measurement should be taken between the inner edges of the lugs using a digital calliper, ensuring the value falls between 11.8mm and 12.2mm.

What is the best strap for the Frederique Constant Slim Line FC-200MCS5B?

The best strap depends on daily use and personal aesthetic preferences. For formal elegance, we recommend alligator with vegetable tanning in brown or black tones, which enhances the minimalist design of the 25mm case. Box calf offers greater versatility in neutral colour combinations, while pre-formed rubber represents the most practical solution for humid environments or outdoor activities. A stainless steel deployant buckle appropriately completes the ensemble, preserving the perception of the timepiece's solidity.

How do you change the strap on the Frederique Constant Slim Line FC-200MCS5B?

To change the strap, you must remove the spring bars that connect the strap to the case lugs. Use a dedicated spring bar tool to apply controlled pressure on one of the bars, freeing it from its seat. Once the bar is removed, slide the strap outward. To install the new strap, align the inner hole of the strap with the lug seat and reinsert the bar with uniform pressure until it clicks. Verify that the strap adheres completely without lateral play.

Are there aftermarket straps compatible with the Frederique Constant Slim Line FC-200MCS5B?

Yes, compatible aftermarket straps exist if the lug width is exactly 12mm. Milano Straps offers a dedicated collection of 12mm straps in alligator leather, box calf, vegetable-tanned leather and rubber, available in both standard and custom-made sizes. The Casati Milano atelier also offers bespoke creation with personal selection of leathers, ensuring maximum aesthetic consistency with the original Slim Line design.

How long does a leather strap last on a 25mm watch like the Frederique Constant Slim Line FC-200MCS5B?

The lifespan of a leather strap depends on frequency of wear, the tanning method used and the level of maintenance. A vegetable-tanned strap, worn daily, has an estimated longevity of 4 to 7 years before replacement becomes necessary. The natural patina that develops over time can be enhanced with periodic cleaning (microfibre cloths) and application of conditioners specific to vegetable-tanned leathers. A pre-formed rubber strap typically maintains its characteristics for 3 to 5 years. The Casati Milano atelier provides an 18-month warranty on custom-made straps.

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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Casati Milano · Via XX Settembre 15, Milan · by appointment only