Frederique Constant · Index
Strap for Frederique Constant Index FC-303V6B4
The Clear Vision Automatic Rose Gold / White takes 23 mm straps. Verified lug width, the straps that fit this model, and answers to the most common questions.
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- Ships in 1–3 working days
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- 30-day returns
- 12-month warranty on manufacturing defects
- Hand-stitched in Milan
Lug width

What length do I need?
Measure your wrist with a tailor's tape or a piece of string, comfortably snug.
| Wrist circumference | Length (long side / short side) |
|---|---|
| 15.0–16.4 cm | 110 / 70 mm |
| 16.5–17.8 cm | 115 / 75 mm |
| 17.9–19.0 cm | 120 / 80 mm |
| 19.1–20.4 cm | 125 / 80 mm |
| 20.5–21.6 cm | 130 / 85 mm |
| 21.7–22.9 cm | 135 / 85 mm |
| over 22.9 cm | on request |
The ready-to-wear strap is 115 × 75 mm. For a smaller or larger wrist I make it in the right length: order your length.
What I'm asked about the Frederique Constant Index FC-303V6B4
What strap size does the Frederique Constant Index FC-303V6B4 take?
The Frederique Constant Index FC-303V6B4 needs 23 mm between the lugs. It's the size I've been fitting on it for years.
Can the strap on the Frederique Constant Index FC-303V6B4 be changed?
Yes. It has spring bars between the lugs: with the right tool the strap comes off in a minute. If you'd rather not risk a scratch, I do it in the workshop.
Can I put a leather strap on the Frederique Constant Index FC-303V6B4?
Yes, in 23 mm leather. On a 43 mm case a calf strap works every day; if you want something more, alligator.
Which strap do you recommend for the Frederique Constant Index FC-303V6B4?
A 23 mm calf strap, for every day. I don't keep this size ready in the catalogue: I make it to measure. If you'd rather have something built on your wrist, the Casati atelier.
More Index
- Frederique Constant Index 303GR5B6B20 mm
- Index Worldtimer Quartz Stainless Steel / Silver20 mm
- Index Worldtimer Quartz Rose Gold / Silver20 mm
- Index Automatic Black20 mm
- Index Automatic Roman Black20 mm
- Index Automatic Chocolate20 mm
- Clear Vision Automatic Rose Gold / Brown23 mm
- Index Automatic Stainless Steel / Silver / Bracelet20 mm
All Index → Frederique Constant families →
Every Index reference with its measured lug width, on watchbands.ai →
For changing the strap
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
The atelier's website: casatimilano.com
