Breitling · Navitimer

Strap for Navitimer 1 B01 Chronograph 43 Red Gold / Blue / Croco / Pin

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
ReferenceRB0121211C1P2 (aka: RB012121.CA03.739P)
FamilyNavitimer
MovementBreitling caliber Caliber B01 Hours, Minutes, Small Seconds | Date | Chronograph, Column wheel | Chronometer
CaseRed 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 Navitimer RB0121211C1P2 (aka: RB012121.CA03.739P)

Selected for the 22 mm lug width · workshop selection

All 22 mm straps →

The Navitimer RB0121211C1P2 (aka: RB012121.CA03.739P), seen from the bench

The Breitling Navitimer RB0121211C1P2, presented in 1952 for pilots and aircraft owners, combines the original technical design with 18k red gold construction. The 43mm case houses the Breitling B01 in-house manual chronograph movement featuring a column wheel, COSC chronometer certification, 28,800 vph frequency, and approximately 70 hours power reserve. The 22mm lug width ensures balanced proportions with the substantial case and accommodates thicker straps without interference. This red gold variant preserves the iconic circular slide rule for flight calculations while adding warmth and depth impossible to achieve with steel.

Frequently asked questions

What is the lug width of the Breitling Navitimer RB0121211C1P2?

The Breitling Navitimer RB0121211C1P2 features a lug width of 22mm. This measurement is standard across the 43mm Navitimer range and allows the use of any 22mm aftermarket strap, including alligator, calf leather, NATO and rubber variants available at milanostraps.it.

What is the best strap for the Breitling Navitimer RB0121211C1P2 in red gold?

For an 18-carat red gold case, the most suitable materials are polished alligator in Havana or cognac tones, which complement the warm chromatic character of the precious metal, or vegetable-tanned calf leather that develops a personal patina over time. Shell cordovan offers a more structured alternative with near-metallic natural sheen. For sportier or travel use, a vulcanised rubber strap in 22mm maintains the proportions of the case whilst ensuring comfort and durability.

How do you change the strap on a Breitling Navitimer RB0121211C1P2?

Strap replacement requires a fine-tipped spring bar tool to compress the spring bar inside the lug. Once the spring is compressed on both sides, the strap slides out laterally. The operation is non-invasive and requires no watchmaker intervention — it takes only a few minutes with the correct tools. It is advisable to work on a soft surface to avoid scratching the red gold case.

Are there aftermarket straps compatible with the Breitling Navitimer RB0121211C1P2?

Yes. Any strap with a 22mm lug width is technically compatible with the Navitimer RB0121211C1P2. milanostraps.it offers a selection of hand-crafted Italian straps fitted with standard 22mm spring bars. To ensure correct fit, verify that the strap case thickness is appropriate for the bezel curvature and that the keeper is correctly positioned relative to the overall strap length.

How long does a leather strap last on a Breitling Navitimer RB0121211C1P2?

The lifespan of a leather strap depends on the quality of the tanning, the finishing layer thickness and usage conditions. A bespoke-quality alligator or vegetable-tanned calf leather strap, kept away from prolonged moisture and treated periodically with a nourishing leather cream, typically lasts 3 to 5 years with daily use. Casati Milano straps are crafted from selected hides and backed by an 18-month guarantee against manufacturing defects.

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.

Request an appointment →

Casati Milano · Via XX Settembre 15, Milan · by appointment only