Longines · Flagship

Strap for Flagship 25 Quartz Stainless Steel White

Takes 13 mm straps. Verified lug width, the straps that fit this model, and answers to the most common questions.

Lug width13 mm
Case diameter25 mm
ReferenceL4.216.4.12.6 (aka: L42164126)
FamilyFlagship
MovementLongines caliber L152 Hours, Jumping 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

The Flagship L4.216.4.12.6 (aka: L42164126), seen from the bench

The Longines Flagship L4.216.4.12.6 is a 25 mm stainless steel dress watch featuring the L152 automatic movement with jumping hour, minutes, seconds, and date. The watch combines refined proportions and minimalist design typical of the Flagship collection, launched in the 1950s. Lug width measures 13 mm, matching the watch's elegant aesthetic and proportions designed for feminine wrists.

Frequently asked questions

What is the lug width of the Longines Flagship L4.216.4.12.6?

The Longines Flagship L4.216.4.12.6 features a lug width of 13 millimetres. This measurement is taken from the inner edge of one lug to the other on the underside of the case and is the standard specification for this family of women's dress watches. Verifying this measurement before purchasing an aftermarket strap is essential to ensure proper compatibility and fit.

Which type of strap is best suited for the Longines Flagship L4.216.4.12.6?

For the 25mm Flagship, alligator leather represents the most fitting choice from both aesthetic and design perspectives. The natural grain of the reptile creates a sophisticated texture that complements the watch's inherent sobriety. Alternatively, vegetable-tanned or aniline calf leather offers an appealing aging patina, whilst rubber remains the practical solution for summer wear without functional compromise.

How do I change the strap on my Longines Flagship L4.216.4.12.6?

Strap removal requires a spring bar removal tool. Locate the tiny holes at the watch's lugs and gently extract the elastic pin, supporting the strap to prevent dropping. Once the pin is removed, the strap releases. Reverse the procedure with the new strap, ensuring the spring bar clicks securely into both lug seatings. Avoid excessive force to prevent scratching the case.

Are compatible aftermarket straps available for the Longines Flagship L4.216.4.12.6?

Yes, Milano Straps provides high-quality aftermarket straps in 13mm size, customisable in leather type (alligator, calf, rubber), colour, initials, and thread colour. These straps are dispatched ready to wear with stainless steel deployante and warranty, offering a sustainable and creative alternative to the original Longines strap.

What is the lifespan of a leather strap on a watch like the Flagship L4.216.4.12.6?

Leather strap longevity depends on tanning method and usage patterns. Quality alligator can last 4–6 years with regular rotation and care (prompt drying after moisture exposure, minimal direct sunlight). Aniline calf tends to deteriorate faster (2–3 years) due to its absorbent nature, whilst vegetable-tanned straps can reach 5–7 years. Milano Straps provides an 18-month warranty on all custom straps.

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