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Formex · Diver

Strap for Formex Diver 2100.1.7030.100

The Diver Automatic Blue / Bracelet takes 22 mm straps. Verified lug width, the straps that fit this model, and answers to the most common questions.

Lug width

22mm
22 mm strapsAll Formex
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Lug width22 mm
Case diameter47 mm
Reference2100.1.7030.100
FamilyDiver
MovementETA caliber 2824-2 Hours, Minutes, Seconds | Date
CaseTitanium, Stainless Steel

Spring bar

Swiss Standard universal spring bars

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

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What I'm asked about the Formex Diver 2100.1.7030.100

What strap size does the Formex Diver 2100.1.7030.100 take?

The Formex Diver 2100.1.7030.100 needs 22 mm between the lugs, usually 18 or 20 mm at the buckle. It's the size I've been fitting on it for years.

Can the strap on the Formex Diver 2100.1.7030.100 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 Diver 2100.1.7030.100?

Yes, in 22 mm leather, as long as you don't wear it in the water: leather doesn't like the sea or the pool. For days in the water, rubber. On a 47 mm diver I go for a full-thickness strap, not a thin one.

Which strap do you recommend for the Formex Diver 2100.1.7030.100?

Rubber if you wear it in the water; otherwise a 22 mm calf strap, full thickness. You'll find it ready in the 22 mm collection. If you'd rather have something built on your wrist, the Casati atelier.

Straps for the Diver 2100.1.7030.100

Selected for the 22 mm lug width · workshop selection

All 22 mm straps →

The Diver 2100.1.7030.100, seen from the bench

The Formex Diver 2100.1.7030.100 represents Swiss technical diving watchmaking tradition with over forty years of refinement. The hybrid titanium and stainless steel case, 46.50mm diameter, is engineered for functionality beyond 200 meters depth, prioritizing underwater legibility and corrosion resistance. The ETA Caliber 2824-2 movement, chronometer-certified, powers hours, minutes, seconds and date display. The 22mm lug width accommodates robust professional straps.

Frequently asked questions

What is the best strap for the Formex Diver 2100.1.7030.100?

The choice depends on your intended use. For prolonged humid environments and diving operations, we recommend vulcanised rubber with grip texture. For urban and formal contexts, leather tanned with traditional vegetable tanning (Tobacco or Cognac) creates enduring elegance. For cross-context versatility, a NATO strap in satin-reinforced fabric in navy blue or black represents the optimal compromise.

Are aftermarket straps compatible with the Formex Diver 2100.1.7030.100?

Yes, any strap with a 22mm lug width is compatible with the 2100.1.7030.100. Milano Straps offers a dedicated collection of artisanal straps in leather, rubber and fabric, all tested for fit and security. We recommend always verifying the correct width before purchase to avoid incompatibility.

How long does a leather strap last on the Formex Diver 2100.1.7030.100?

A quality leather strap (vegetable tanned) lasts an average of 3–5 years with daily wear, extending to 7–8 years with moderate use. Longevity depends on moisture exposure, frequency of wear and maintenance (periodic cleaning, drying after water exposure). In very humid environments, rubber straps are recommended to preserve the leather.

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.

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

The atelier's website: casatimilano.com