Formex · Essence

Strap for Essence Automatic Chronometer Black / 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
Reference0330.1.6321.713
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 0330.1.6321.713

Selected for the 22 mm lug width · workshop selection

All 22 mm straps →

The Essence 0330.1.6321.713, seen from the bench

The Formex Essence reference 0330.1.6321.713 is powered by the automatic Sellita SW200-1 caliber with hour, minute, second, and date indications. The watch features 22mm lugs for the strap. The movement provides the essential time-reading functions with a date complication.

Frequently asked questions

What is the lug width of the Formex Essence 0330.1.6321.713?

The lug width of the Formex Essence 0330.1.6321.713 is 22mm. This measurement is crucial when selecting a compatible strap: the lug width must match precisely the spring bar holes of your chosen strap to avoid misalignment or unwanted lateral movement.

Which strap do you recommend for the Formex Essence 0330.1.6321.713?

For the Formex Essence 0330.1.6321.713, we recommend a strap in vegetable-tanned leather, warm brown or cognac tone: vegetable leather develops a natural patina over time that pairs beautifully with the stainless steel case. Alternatively, a fine-grain black calf or a heavy cotton NATO strap offers stylistic versatility whilst maintaining formal coherence.

How do I change the strap on my Formex Essence 0330.1.6321.713?

Strap replacement requires a spring bar tool or bayonet removal implement to extract the lateral pins from the lugs. Position the watch with the lugs facing upward, insert the tool into the small recess beneath the spring bar, then gently push to free the pin. Once extracted, the old strap detaches. Repeat on the opposite lug. Install the new strap by reversing the process.

Are there aftermarket straps compatible with the Formex Essence 0330.1.6321.713?

Yes. Any strap with a 22mm lug width is compatible. Milano Straps offers a dedicated selection of artisanal straps in leather, NATO and rubber, all configured for 22mm lugs. We recommend verifying the total strap length so the adjustment hole sits in the central band, ensuring both aesthetic and practical comfort.

How long does a leather strap last on the Formex Essence 0330.1.6321.713?

A quality leather strap, used daily, has an average lifespan of 3-5 years before replacement is warranted. Vegetable-tanned leather ages visibly yet gradually, developing patina and chromatic shifts: this process is natural and desired by enthusiasts. Factors including humidity, sun exposure and frequency of use influence longevity.

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