Longines · Presence

Strap for Presence 34.5 Automatic Gold

Takes 18 mm straps. Verified lug width, the straps that fit this model, and answers to the most common questions.

Lug width18 mm
Case diameter35 mm
ReferenceL4.778.6.12.0 (aka: L47786120)
FamilyPresence
MovementLongines caliber L619.2 hours, minutes, seconds | date
CaseYellow Gold

Spring bar

Swiss Standard universal spring bars

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

Straps for the Presence L4.778.6.12.0 (aka: L47786120)

Selected for the 18 mm lug width

All 18 mm straps →

The Presence L4.778.6.12.0 (aka: L47786120), seen from the bench

The Longines Presence reference L4.778.6.12.0 features the L619.2 caliber with hour, minute, second and date indication. The case has 18mm lugs for the strap. The movement offers the essential functions with a date complication.

Frequently asked questions

What is the lug width of the Longines Presence L4.778.6.12.0?

The Longines Presence L4.778.6.12.0 features a lug width of 18mm. This dimension is specific to the model and characteristic of Presence watches in the compact 34.50mm case format, maintaining the balanced proportions typical of the vintage design heritage. To verify strap compatibility, measure the internal distance between the case lugs: it should be exactly 18mm.

Which strap would you recommend for the Longines Presence L4.778.6.12.0?

For a Presence in yellow gold, we recommend alligator in dark brown or cognac, which creates chromatic harmony with the precious metal. Natural shell cordovan represents an extraordinary alternative with exceptional luminosity. Vegetable-tanned calf in hazelnut or warm beige tones offers an equilibrium between elegance and practicality. All straps must feature an 18mm lug width. Explore the complete selection of 18mm-compatible straps on milanostraps.it.

How do I change the strap on the Longines Presence L4.778.6.12.0?

Strap replacement requires a dedicated tool: the spring bar tool. Position the watch on a stable surface, locate the spring bars securing the strap to the case lugs, push them inward with the tool to release tension, then remove the old strap. Insert the new strap by aligning the holes with the lugs, ensuring the spring bars engage properly on both sides. If uncertain, consult a professional watchmaker.

Can I fit an aftermarket strap on this Longines Presence?

Yes, any aftermarket strap compatible with 18mm lugs can be fitted. Milanostraps offers an extensive selection of hand-crafted straps in alligator, shell cordovan, calf leather, and technical rubber, all customisable. The Casati Milano atelier creates bespoke straps with personal leather selection and an 18-month warranty, available by appointment for a fully bespoke experience.

What is the expected lifespan of a leather strap for the Longines Presence?

The lifespan of a leather strap depends on leather quality and usage frequency. Superior-grade alligator and shell cordovan last 8–12 years with regular wear and maintenance (cleaning, drying, occasional balm application). Vegetable-tanned calf leather typically lasts 5–7 years. Factors such as humidity, skin perspiration, and wearing frequency significantly affect longevity. A bespoke strap from Casati Milano, subjected to inspection and restoration, can last decades.

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