Tudor · Black Bay Ceramic

Strap for Tudor Black Bay Ceramic 7941A1ACNU

The Tudor Black Bay Ceramic 7941A1ACNU takes 21 mm straps. Verified lug width, the straps that fit this model, and answers to the most common questions.

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Lug width21 mm
Case diameter41 mm
Reference7941A1ACNU
FamilyBlack Bay Ceramic
Movementcaliber MT5602-U, automatic
Year2026
Casematte black ceramic
Water resistance200

Spring bar

Spring bars for Tudor

The right category for this model · choose the 21 mm size

Standard spring bar · length 21 mm · Ø 1.8 mm double flange · industry standard, no brand part number

Tudor Black Bay Ceramic 7941A1ACNU — watch

What length do I need?

Measure your wrist with a tailor's tape or a piece of string, comfortably snug.

Wrist circumferenceLength (long side / short side)
15.0–16.4 cm120 / 70 mm
16.5–17.8 cm125 / 75 mm
17.9–19.0 cm130 / 80 mm
19.1–20.3 cm135 / 85 mm
20.4–21.6 cm140 / 85 mm
21.7–22.9 cm145 / 90 mm

The ready-to-wear strap is 115 × 75 mm. For a smaller or larger wrist I make it in the right length: order your length.

What I'm asked about the Tudor Black Bay Ceramic 7941A1ACNU

What strap size does the Tudor Black Bay Ceramic 7941A1ACNU take?

The Tudor Black Bay Ceramic 7941A1ACNU needs 21 mm between the lugs, usually 18 mm at the buckle. It's the size I've been fitting on it for years.

Can the strap on the Tudor Black Bay Ceramic 7941A1ACNU 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 Ceramic 7941A1ACNU?

Yes, in 21 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. I don't keep rubber ready in 21 mm: write to me and I'll make it.

Which strap do you recommend for the Tudor Black Bay Ceramic 7941A1ACNU?

Rubber if you wear it in the water; otherwise a 21 mm calf strap, full thickness. You'll find it ready in the 21 mm collection. If you'd rather have something built on your wrist, the Casati atelier.

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

Updated on · by Antonio Zichichi