Breitling · Premier

Strap for Premier Automatic 40 Stainless Steel / Anthracite / Nubuck Brown / Folding

Takes 20 mm straps. Verified lug width, the straps that fit this model, and answers to the most common questions.

Lug width20 mm
Case diameter40 mm
ReferenceA37340351B1X1
FamilyPremier
MovementBreitling caliber Caliber 37 Hours, Minutes, Small 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 Premier A37340351B1X1, seen from the bench

The Breitling Premier Automatic A37340351B1X1 is a 40 mm stainless steel dress watch from the line that returns the Grenchen manufacture to its 1940s roots. It features the Breitling Caliber 37 automatic movement with hours, minutes, small seconds at 6 o'clock, and date display. The case has a satined finish on the sides and polished on the bevels, with tapered lugs ending at 20 mm lug width. The asymmetrical dial design with off-center small seconds recalls vintage pocket watch aesthetics while maintaining modern precision.

Frequently asked questions

What is the lug width of the Breitling Premier A37340351B1X1?

The lug width of the Breitling Premier A37340351B1X1 is 20 mm. This measurement should be taken internally between the two lugs using a digital calliper, at rest and without applying pressure to the steel, to ensure correct compatibility with any aftermarket strap.

What is the best strap for the Breitling Premier A37340351B1X1?

For the Premier A37340351B1X1 in brushed stainless steel, the most suitable materials are square-scaled alligator for formal settings, shell cordovan for intensive daily wear that develops a natural patina over time, and vegetable-tanned calf leather for a balance between elegance and durability. A brushed steel deployant clasp completes the pairing both functionally and aesthetically.

How do I change the strap on the Breitling Premier A37340351B1X1?

To replace the strap on the Breitling Premier A37340351B1X1, use a fine-tipped or lever-style spring bar tool, inserting it into the spring bar slot on the inner side of the lug. Compress the spring bar, remove the strap, and insert the new one by reversing the process. It is advisable to work on a soft surface to avoid scratching the brushed case.

Are there aftermarket straps compatible with the Breitling Premier A37340351B1X1?

Yes, any strap with a 20 mm lug width is technically compatible with the Breitling Premier A37340351B1X1, provided the spring bar is standard gauge (1.5 mm diameter). On milanostraps.it you will find a range of handcrafted 20 mm straps in various materials and finishes, compatible with this reference and made to order by Casati Milano atelier.

How long does a leather strap last on the Breitling Premier A37340351B1X1?

The lifespan of a leather strap depends on the material and frequency of use. A quality shell cordovan or alligator strap with vegetable tanning and hand-burnished edges can last between 3 and 7 years with moderate daily wear. Calf leather has a shorter average life of 1 to 3 years. Factors such as perspiration, water exposure and storage conditions significantly affect longevity. Casati Milano offers 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.

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