Tudor · Black Bay One
Strap for Tudor Black Bay One 79540-0012
The Heritage Black Bay 41 Silver / Black Fabric takes 22 mm straps. Verified lug width, the straps that fit this model, and answers to the most common questions.
Lug width
Recommended spring bar
Straps for the Black Bay One 79540-0012
Selected for the 22 mm lug width · workshop selection
Blue Alligator and Rubber Hybrid Strap · rubber, for the water€138
Pink Rubber and Alligator Strap · rubber, for the water€138
Hammered Pink Strap with Ecru Stitching★ 5 · 1€98
Vintage Brown Calfskin Strap — Natural Patina★ 4.9 · 11€98
Hammered Calfskin Strap Light Blue€98
Dark Brown Calfskin Military Strap★ 3 · 1€80
What I'm asked about the Tudor Black Bay One 79540-0012
What strap size does the Tudor Black Bay One 79540-0012 take?
The Tudor Black Bay One 79540-0012 needs 22 mm between the lugs, usually 18 or 20 mm at the buckle. It's the size I've been fitting on it for years.
Can the strap on the Tudor Black Bay One 79540-0012 be changed?
Yes. It has spring bars between the lugs: with the right tool the strap comes off in a minute. If you'd rather not risk a scratch, I do it in the workshop.
Can I put a leather strap on the Tudor Black Bay One 79540-0012?
Yes, in 22 mm leather, as long as you don't wear it in the water: leather doesn't like the sea or the pool. For days in the water, rubber. On a 41 mm diver I go for a full-thickness strap, not a thin one.
Which strap do you recommend for the Tudor Black Bay One 79540-0012?
Rubber if you wear it in the water; otherwise a 22 mm calf strap, full thickness. You'll find it ready in the 22 mm collection. If you'd rather have something built on your wrist, the Casati atelier.
The Black Bay One 79540-0012, seen from the bench
Frequently asked questions
What is the best strap for the Black Bay One 79540-0012?
Alligator leather in vegetable tanning represents the most aesthetically coherent choice with the model's vintage and sports heritage. Havana brown tone dialogues naturally with the dark blue dial, creating an elegant contrast. Valid alternatives include vegetable-tanned calf for a restrained look, cotton NATO straps for military functionality, and FKM rubber for intensive aquatic use.
Can I use an aftermarket strap on a Tudor Black Bay One 79540-0012?
Yes, any strap with a 22mm lug width is mechanically compatible. However, the choice of material and finish affects overall aesthetic harmony. Avoid straps with artificial texture or pastel colours, which clash with the Black Bay One's functionalist character. Artisanal straps in vegetable-tanned leather or alligator maintain coherence with Tudor's constructive philosophy.
How long does a leather strap last on a Tudor Black Bay One 79540-0012?
A strap in vegetable-tanned leather, used daily with ordinary care, maintains mechanical functionality for approximately 18–24 months. Durability depends on intensity of use, UV exposure and ambient humidity. Vegetable tanning develops an authentically aged patina within the first year, enhancing aesthetic appeal. Regular conservative treatments (neutral creams, not water-proofing products) extend the strap's lifespan.
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
The atelier's website: casatimilano.com