Formex · Motorsport

Strap for Formex Motorsport 3100.9.8299.216

The Motorsport Automatic Chronograph PVD / Carbon Bezel / Black / Limited Edition / Calf takes 25 mm straps. Verified lug width, the straps that fit this model, and answers to the most common questions.

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  • Hand-stitched in Milan
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Lug width25 mm
Case diameter47 mm
Reference3100.9.8299.216
FamilyMotorsport
MovementETA caliber 7750 Hours, Minutes, Small seconds | Date, Day | Chronograph
CaseTitanium, Carbon, Stainless Steel

Spring bar

Swiss Standard universal spring bars

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

Standard spring bar · length 25 mm · Ø 1.8 mm double flange

Motorsport Automatic Chronograph PVD / Carbon Bezel / Black / Limited Edition / Calf — watch

What length do I need?

Measure your wrist with a tailor's tape or a piece of string, comfortably snug.

Wrist circumferenceLength (long side / short side)
15.0–16.4 cm120 / 70 mm
16.5–17.8 cm125 / 75 mm
17.9–19.0 cm130 / 80 mm
19.1–20.3 cm135 / 85 mm
20.4–21.6 cm140 / 85 mm
21.7–22.9 cm145 / 90 mm

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 Formex Motorsport 3100.9.8299.216

What strap size does the Formex Motorsport 3100.9.8299.216 take?

The Formex Motorsport 3100.9.8299.216 needs 25 mm between the lugs. It's the size I've been fitting on it for years.

Can the strap on the Formex Motorsport 3100.9.8299.216 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 Formex Motorsport 3100.9.8299.216?

Yes, in 25 mm leather. On a 47 mm chronograph I like box calf: it holds its shape and carries a substantial case.

Which strap do you recommend for the Formex Motorsport 3100.9.8299.216?

A 25 mm box calf. 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.

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

Updated on · by Antonio Zichichi