Frederique Constant · Horological Smartwatch

Strap for Horological Smartwatch Silver Dial / Strap

Takes 20 mm straps. Verified lug width, the straps that fit this model, and answers to the most common questions.

Lug width20 mm
Case diameter42 mm
ReferenceFC-285S5B6
FamilyHorological Smartwatch
MovementFrederique Constant caliber FC-285 Hours, Minutes | 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 Horological Smartwatch FC-285S5B6

Selected for the 20 mm lug width · workshop selection

All 20 mm straps →

The Horological Smartwatch FC-285S5B6, seen from the bench

The Frederique Constant Horological Smartwatch FC-285S5B6 is a 42mm stainless steel hybrid timepiece featuring the FC-285 caliber movement. It combines mechanical functions with intelligent digital notifications displayed in a discrete window, preserving the visual integrity of a traditional watch. The 20mm lug width accommodates standard aftermarket straps and suits medium to large wrists.

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