Formex · Essence

Strap for Essence Automatic Chronometer Blue / Bracelet

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

Lug width22 mm
Case diameter43 mm
Reference0330.1.6331.100
FamilyEssence
MovementSellita caliber SW200-1 a Hours, Minutes, Seconds | Date
CaseStainless 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 Essence 0330.1.6331.100

Selected for the 22 mm lug width · workshop selection

All 22 mm straps →

The Essence 0330.1.6331.100, seen from the bench

The Formex Essence Automatic Chronometer Blue 0330.1.6331.100 is a 43mm stainless steel tool watch powered by a Sellita SW200-1 movement, featuring hours, minutes, seconds, and date functions. The 22mm lug width reflects classical proportions between the case diameter and lug design. Built on independent Swiss watchmaking philosophy, this model prioritizes functional clarity and technical robustness without decorative elements, with the stainless steel case developing characteristic patina over time.

Frequently asked questions

What is the lug width of the Formex Essence 0330.1.6331.100?

The lug width of the Formex Essence 0330.1.6331.100 is 22mm. This measurement represents the inner distance between the two lugs on the case and is crucial for selecting any aftermarket strap. Always verify this dimension before purchasing a replacement strap.

Which strap is best suited for the Formex Essence 0330.1.6331.100?

For the Formex Essence 0330.1.6331.100, we recommend a vegetable-tanned leather strap, which develops a natural patina that complements the case steel. Alternatively, technical NATO straps offer sports practicality, whilst elastomer materials provide environmental resistance for marine use. Selection depends on intended usage profile.

How do I change the strap on this watch?

Strap replacement requires a spring bar tool to remove the elastic bars securing the lugs to the case. Proceed with care to avoid scratching the metal. If inexperienced, consult a watchmaker or bespoke atelier such as Casati Milano for professional strap change service.

Can I use an aftermarket compatible strap on this Formex?

Yes, any strap with a 22mm lug width is mechanically compatible with the Formex Essence 0330.1.6331.100. Milano Straps offers a curated selection of 22mm straps in vegetable-tanned leather, NATO, and elastomer, all verified for mechanical compatibility. Artisanal quality ensures professional finishing.

What is the average lifespan of a leather strap on this watch?

A vegetable-tanned leather strap develops natural patina gradually: typical lifespan is 3-5 years under intensive daily use, extendable to 7-8 years with regular maintenance (cleaning, drying after moisture exposure). Longevity depends on frequency of use, environmental conditions, and material care.

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