Formex · Essence

Strap for Essence Automatic Chronometer Blue / Calf

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
Reference0330.1.6331.722
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 0330.1.6331.722

Selected for the 22 mm lug width · workshop selection

All 22 mm straps →

The Essence 0330.1.6331.722, seen from the bench

The Formex Essence Automatic Chronometer 0330.1.6331.722 is a 43mm stainless steel case watch featuring a Sellita SW200-1 movement with 28,800 vph, 38-hour power reserve, and ETA-derived mechanics. The satin-finished 316L steel case houses an intense blue dial with window date and minimalist baton indices under sapphire crystal. Water resistance reaches 100 metres for daily use and occasional swimming. The 22mm lug width accommodates a wide variety of aftermarket straps while maintaining proper case-to-wrist proportions. Part of the Essence collection, this independent Swiss watchmaker model exemplifies functional design without aesthetic excess.

Frequently asked questions

What is the lug width of the Formex Essence 0330.1.6331.722?

The lug width is precisely 22mm. This measurement refers to the linear distance between the inner shoulders of the two metal lugs on the case. It is crucial to measure accurately between the bar pins without including outer protrusions to ensure correct compatibility with aftermarket straps.

Which strap is most suitable for the Formex Essence 0330.1.6331.722?

The choice depends on usage and desired aesthetics. An alligator or dark brown vegetable-tanned leather strap creates sophisticated contrast with the brushed stainless steel case and blue dial. For a minimalist approach, a black vitello pullup or dark grey FKM rubber strap offers daily versatility. Ballistic polyamide NATO straps are ideal for those seeking an austere aesthetic.

How do I change the strap on the Formex Essence 0330.1.6331.722?

Use a spring bar tool (forked metal instrument) to gently compress the spring-loaded pins of the lugs. Insert the flat end of the tool under the pin and apply steady pressure until the pin slides out of the lug on the case. Repeat for the other lug. To install the new strap, align the pins with the lugs and insert them until you feel the spring click into position. Work carefully to avoid scratching the case.

Are aftermarket straps available that are compatible with the Formex Essence 0330.1.6331.722?

Yes. All straps with 22mm lug width are compatible. Milano Straps offers a wide selection in Italian vegetable-tanned leather, alligator, technical rubber, and NATO fabrics. Each strap is selected to guarantee construction quality and visual proportions consistent with the Essence's minimalist aesthetic.

How long does a leather strap last on the Formex Essence 0330.1.6331.722?

A quality vegetable-tanned leather strap (traditional Tuscan tanning) lasts between 3 and 5 years with moderate daily wear, developing an visually interesting patina over time. Longevity depends on climate, frequency of wear, ambient humidity, and periodic care (gentle cleaning with cloth). Alligator straps are more durable (5-7 years) due to skin density. FKM rubber has similar longevity but degrades more uniformly without visual patina.

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