Breitling · Navitimer

Strap for Navitimer 1 35 Automatic Stainless Steel / Pink MOP / eComm / Croco

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
ReferenceA173951A1K1P1
FamilyNavitimer
MovementBreitling caliber Caliber 17 ND Hours, Minutes, Seconds
CaseStainless Steel

Spring bar

Swiss Standard universal spring bars

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

The Navitimer A173951A1K1P1, seen from the bench

The Navitimer 1 35 Automatic is a refined reinterpretation of Breitling's iconic aviation chronograph, originally designed in 1952 as a navigation instrument for AOPA pilots. This stainless steel model (ref. A173951A1K1P1) features a 35mm case housing the Breitling Caliber 17 ND automatic movement, delivering hours, minutes, and seconds with COSC-certified precision. The 18mm lug width is specific to this variant and requires careful aftermarket strap selection to maintain proper aesthetics and comfort. Water resistant to 30 meters with sapphire crystal and luminescent hands for instrument-like legibility.

Frequently asked questions

What is the lug width of the Breitling Navitimer A173951A1K1P1?

The Breitling Navitimer A173951A1K1P1 has an 18mm lug width. This measurement should be taken with a digital calliper between the inner faces of the lugs at their narrowest point to ensure a precise strap replacement without any modification.

What is the best strap for the Navitimer 35mm with 18mm lug width?

For the steel-cased Navitimer 35mm, the most coherent options are vegetable-tanned alligator for a sartorial aesthetic, smooth calfskin for professional daily wear, nylon NATO to reference the avionic heritage, and vulcanised rubber for humid or sporting environments. The choice depends on the dial colour and intended use.

How do I change the strap on the Breitling Navitimer A173951A1K1P1?

Strap replacement requires a fine-tip or fork-type spring bar tool, inserted into the lug hole to compress the spring bar. With an 18mm lug, it is advisable to work on a soft cushion to avoid scratching the case. The operation does not require movement disassembly or watchmaker intervention.

Are there aftermarket straps compatible with the Navitimer A173951A1K1P1?

Yes. Any strap with an 18mm attachment is technically compatible with this reference. milanostraps.it offers a selection of handcrafted 18mm straps in various materials, all fitted with standard spring bars compatible with original Breitling lugs.

How long does a leather strap last on a Breitling Navitimer?

A quality leather strap typically lasts between 18 and 36 months with regular wear, depending on exposure to perspiration, water and UV light. A vegetable-tanned alligator strap, properly maintained with specialist leather conditioner, can exceed three years while retaining its texture and structural integrity.

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