Formex · Diver

Strap for Diver Automatic Blue / Rubber

Takes 22 mm straps. Verified lug width, the straps that fit this model, and answers to the most common questions.

Lug width22 mm
Case diameter47 mm
Reference2100.1.7030.940
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

Straps for the Diver 2100.1.7030.940

Selected for the 22 mm lug width · workshop selection

All 22 mm straps →

The Diver 2100.1.7030.940, seen from the bench

The Formex Diver 2100.1.7030.940 is a 46.50mm tool watch powered by the ETA Caliber 2824-2 movement, offering 38 hours of power reserve and ±6 seconds daily precision. The hybrid case combines titanium and stainless steel for corrosion resistance and structural durability. Featuring a unidirectional bezel, 300-meter water resistance, and a 22mm lug width, this professional diving instrument incorporates a dark dial with luminous batons and a window date at 3 o'clock, housed in approximately 14mm thickness.

Frequently asked questions

What is the lug width of the Formex Diver 2100.1.7030.940?

The lug width (ansa width) of the Formex Diver 2100.1.7030.940 is 22mm. This dimension is crucial for aftermarket strap compatibility. To verify your strap measurement, use a digital calliper to measure the space between the lugs: it must be precisely 22mm to ensure optimal and secure fit. At milanostraps.it, you will find a comprehensive selection of straps certified for this lug width.

Which strap type is best suited for the Formex Diver 2100.1.7030.940?

The choice depends on intended use. For genuine aquatic applications, FKM (Viton) rubber with non-slip texture provides resistance to saltwater and environmental agents. An alligator strap with vegetable tanning in dark tones (navy, brown) balances elegance and technical functionality. A nylon NATO in matte finish amplifies the Diver's instrumental identity. Shell cordovan remains the most sophisticated solution for formal contexts. All these materials are available in 22mm configuration at milanostraps.it.

How do you correctly change the strap on the Formex Diver 2100.1.7030.940?

Strap replacement is performed via the spring bars positioned on the sides of the case. Procedure: (1) Position the watch on a soft, stable surface; (2) use a dedicated spring bar tool to compress one spring at a time; (3) extract the spring whilst compressing it; (4) remove the old strap; (5) insert the new strap starting from one side, compress the spring and guide the opposite end into correct position. Ensure springs are fully locked before wearing the watch. milanostraps.it straps are pre-shaped for 22mm lug width.

Is an aftermarket strap compatible with the Formex Diver 2100.1.7030.940?

Yes, provided the strap is certified for 22mm lug width. Quality aftermarket straps produced by specialist artisans respect the ±0.5mm tolerances required for secure fit. Always verify the declared lug width before purchase. At milanostraps.it, all straps in the 22mm collection have been tested for compatibility with the Formex Diver 2100.1.7030.940 and related models. Avoid straps with lug width below 21.5mm or above 22.5mm to ensure functionality and safety.

What is the average lifespan of a leather strap for the Formex Diver 2100.1.7030.940?

A quality artisanal vegetable-tanned leather strap, worn daily with ordinary care, maintains structural and aesthetic integrity for 3-5 years. Lifespan depends on: frequency of wear, exposure to moisture/water, wrist movement, regularity of maintenance. Vegetable leather develops visible patina over time, a desirable characteristic documenting genuine use. To extend useful life, apply protective balm every 6-12 months and allow the strap to dry completely after moisture exposure. Shell cordovan typically lasts 5-7 years due to fibre density. FKM (Viton) rubber maintains physical properties for 7-10 years, with slow, predictable progressive degradation.

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