Frederique Constant · Index
Strap for Index Automatic Roman Black
Takes 20 mm straps. Verified lug width, the straps that fit this model, and answers to the most common questions.
Lug width
20mm
Lug width20 mm
Case diameter40 mm
ReferenceFC-303BN5B6B
FamilyIndex
MovementFrederique Constant caliber FC-303
Hours, Minutes, Seconds | Date
CaseStainless Steel
Straps for the Index FC-303BN5B6B
Selected for the 20 mm lug width · workshop selection
Vintage Black Calfskin Leather Strap€80
Hammered Calfskin Strap Light Blue€98
Hammered Calfskin Watch Strap Green with Ecru Stitching€98
Vintage Olive Green Calf Leather Watch Strap€80
Hammered Black Calfskin Strap — Ecru Stitching€98
The Index FC-303BN5B6B, seen from the bench
The Frederique Constant Index reference FC-303BN5B6B is equipped with the in-house automatic caliber FC-303. The movement offers hour, minute, central seconds and date indications. The watch features essential functions in a three-hand configuration with date complication.
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