Omega · Seamaster 120M
Strap for Omega Seamaster 120M 120M-2511-21
The Omega Seamaster 120M 120M-2511-21 takes 18 mm straps. Verified lug width, the straps that fit this model, and answers to the most common questions.
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- Ships in 1–3 working days
- Worldwide shipping
- 30-day returns
- 12-month warranty on manufacturing defects
- Hand-stitched in Milan
Lug width
Recommended spring bar
Straps for the Seamaster 120M 120M-2511-21
Selected for the 18 mm lug width
Vintage Grey Leather Strap – Handmade in Milan★ 4.5 · 4€80
Vintage Olive Green Calf Leather Watch Strap★ 4.5 · 4€80
Brown Italian Leather Strap★ 4 · 6€80
Black Saffiano Strap Ecru Stitching★ 5 · 5€90
Black Calfskin Rally Watch Strap – Handmade in Milan★ 5 · 2€110
Black and Blue Leather Driver Strap★ 5 · 1€130
What length do I need?
Measure your wrist with a tailor's tape or a piece of string, comfortably snug.
| Wrist circumference | Length (long side / short side) |
|---|---|
| 15.0–16.4 cm | 110 / 70 mm |
| 16.5–17.8 cm | 115 / 75 mm |
| 17.9–19.0 cm | 120 / 80 mm |
| 19.1–20.4 cm | 125 / 80 mm |
| 20.5–21.6 cm | 130 / 85 mm |
| 21.7–22.9 cm | 135 / 85 mm |
| over 22.9 cm | on request |
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 Omega Seamaster 120M 120M-2511-21
What strap size does the Omega Seamaster 120M 120M-2511-21 take?
The Omega Seamaster 120M 120M-2511-21 needs 18 mm between the lugs. It's the size I've been fitting on it for years.
Can the strap on the Omega Seamaster 120M 120M-2511-21 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 Omega Seamaster 120M 120M-2511-21?
Yes, in 18 mm leather. On a case a calf strap works every day; if you want something more, alligator.
Which strap do you recommend for the Omega Seamaster 120M 120M-2511-21?
A 18 mm calf strap, for every day. You'll find it ready in the 18 mm collection. If you'd rather have something built on your wrist, the Casati atelier.
More Seamaster 120M
- Seamaster 120M Automatic 36.25 Yellow Gold / Champagne18 mm
- Seamaster 120M Automatic 36.25 Yellow Gold / White18 mm
- Seamaster 120M Automatic 36.25 Yellow Gold / Blue18 mm
- Seamaster 120M Automatic 36.25 Yellow Gold / Diamond / Champagne18 mm
- Seamaster 120M Automatic 36.25 Yellow Gold / Diamond / Champagne18 mm
- Seamaster 120M Automatic 36.25 Yellow Gold / Diamond / Champagne18 mm
- Seamaster 120M Automatic 36.25 Yellow Gold / Diamond / White18 mm
- Seamaster 120M Automatic 36.25 Yellow Gold / Diamond / White18 mm
All Seamaster 120M → Omega families →
Every Seamaster 120M reference with its measured lug width, on watchbands.ai →
More Omega in 18 mm
- Omega De Ville 111-0139De Ville
For changing the strap
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