Frederique Constant · Classics

Strap for Classics Automatic Stainless Steel / Silver

Takes 22 mm straps. Verified lug width, the straps that fit this model, and answers to the most common questions.

Lug width22 mm
Case diameter40 mm
ReferenceFC-303MC4P6
FamilyClassics
MovementFrederique Constant caliber FC-303 hours, minutes, seconds | date
CaseStainless Steel

Spring bar

Swiss Standard universal spring bars

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

Straps for the Classics FC-303MC4P6

Selected for the 22 mm lug width · workshop selection

All 22 mm straps →

The Classics FC-303MC4P6, seen from the bench

The Classics FC-303MC4P6 is powered by the in-house automatic caliber FC-303 with indication of hours, minutes, seconds and date. The movement is produced internally by Frederique Constant. The watch features 22mm lugs for the strap.

Frequently asked questions

What is the lug width of the Frederique Constant Classics FC-303MC4P6?

The lug width of the Frederique Constant Classics FC-303MC4P6 is 22mm. This measurement is determined by the distance between the lateral lugs of the case and corresponds exactly to the width that the strap must possess for a perfect fit without gaps or excessive tension.

Which strap is best for the Frederique Constant Classics FC-303MC4P6?

For the Classics FC-303MC4P6, we recommend a vegetable-tanned leather strap in cognac brown or black tones, which reflects the sober elegance of the watch. Alternatively, shell cordovan or premium Italian calf leather guarantees durability and natural patina development over time. For more casual contexts, a cotton NATO strap maintains versatility.

How do I change the strap on the Frederique Constant Classics FC-303MC4P6?

To change the strap, you need a spring bar tool with a flat tip to compress the small metal springs (spring bars) hidden within the lugs. Once released, the old strap slides out and the new one is inserted using the reverse procedure. If you are uncertain, consult a professional watchmaker.

Can I use a quality aftermarket strap on the Frederique Constant Classics FC-303MC4P6?

Yes, absolutely. A quality artisan-crafted 22mm strap enhances the wearing experience of the Classics FC-303MC4P6. Verify that the width is precisely 22mm, that the leather is treated with noble processes (vegetable tanning), and that the stitching is regular and well-executed. Customised straps from specialised craftsmen offer excellent value for money.

How long does a leather strap last?

A well-maintained vegetable-tanned leather strap typically lasts 2-4 years of daily use. Durability depends on intensity of use, climate, humidity exposure, and maintenance. Premium quality leather (shell cordovan, fine calf) resists longer. The patina that develops is a natural part of ageing and adds character. Avoid prolonged exposure to direct sunlight and water to extend useful life.

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.

Request an appointment →

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