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
ReferenceRB0121211C1P1 (aka: RB012121.CA03.743P)
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 RB0121211C1P1 (aka: RB012121.CA03.743P)

Selected for the 22 mm lug width · workshop selection

All 22 mm straps →

The Navitimer RB0121211C1P1 (aka: RB012121.CA03.743P), seen from the bench

The Navitimer 1 B01 Chronograph 43 Red Gold is a chronograph born in 1952 in collaboration with the Aircraft Owners and Pilots Association. Reference RB0121211C1P1 features a 43 mm case in 18-carat red gold, a column-wheel integrated chronograph Caliber B01 certified COSC with approximately 70 hours power reserve, and operates at 28,800 vibrations per hour. The 22 mm lug width accommodates flat-shoulder straps, and the black or bronze dial complements the satin-finished and polished red gold case.

Frequently asked questions

What is the lug width of the Breitling Navitimer RB0121211C1P1?

The Breitling Navitimer RB0121211C1P1 features a lug width of 22 mm. This measurement refers to the internal distance between the two lugs at the point where the strap makes contact with the case. It is advisable to verify this dimension using a digital calliper before purchasing an aftermarket strap, as the horizontal lug geometry specific to the Navitimer requires a correctly shaped end piece.

What is the best strap for the Breitling Navitimer RB0121211C1P1 in red gold?

For the Navitimer RB0121211C1P1 in 18kt red gold, a vegetable-tanned alligator strap — in dark brown, cognac or tobacco — is the most coherent choice given the watch's value. The scale texture enhances the warm reflections of red gold and develops a personal patina over time. Shell cordovan in a smooth finish offers a compact, lustrous surface as a refined alternative. For more active use, vulcanised rubber in black or slate grey is the most practical option without compromising aesthetics.

How do I change the strap on the Breitling Navitimer RB0121211C1P1?

The strap on the Navitimer RB0121211C1P1 is removed using a spring bar tool or a flat-blade strap-changing tool. The Navitimer's characteristic horizontal lugs make the operation manageable without sending the watch to a service centre, provided the correct tool is used to avoid scratching the red gold surfaces. Always work on a clean, soft surface. Should you have any doubts, Casati Milano can assist with fitting a bespoke strap.

Are there aftermarket straps compatible with the Breitling Navitimer RB0121211C1P1?

Yes, aftermarket straps compatible with the Breitling Navitimer RB0121211C1P1 are available, provided they feature a 22 mm lug width and a shaped end piece designed to fit the Navitimer's horizontal lug geometry. Casati Milano produces bespoke straps specifically profiled for this reference, available in alligator, vegetable-tanned calf, shell cordovan and vulcanised rubber. They can be purchased directly online or fully customised at the Milan atelier.

How long does a leather strap for the Breitling Navitimer RB0121211C1P1 last?

The lifespan of a leather strap depends primarily on the quality of the tanning process and daily wear conditions. A vegetable-tanned alligator or calf strap, properly maintained — kept away from water, excessive perspiration and direct sunlight — will retain its structural and aesthetic integrity for 3 to 5 years of regular use. Casati Milano offers an 18-month warranty against manufacturing defects on all straps. Rotating between two straps will significantly extend the life of both.

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