Omega · Railmaster
Strap for Omega Railmaster 2812.52.31
The Seamaster Aqua Terra 150M Automatic 42.2 Railmaster Chronograph / Black Alligator takes 21 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
Your watch with our straps
Calf, Orange
Grand Cavalier Leather Strap Orange
€120
★ 4.9 · 12
1 / 57
Real photos of the strap and the case. No generated images.
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 Railmaster 2812.52.31
What strap size does the Omega Railmaster 2812.52.31 take?
The Omega Railmaster 2812.52.31 needs 21 mm between the lugs. It's the size I've been fitting on it for years.
Can the strap on the Omega Railmaster 2812.52.31 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 Railmaster 2812.52.31?
Yes, in 21 mm leather. On a 42 mm chronograph I like box calf: it holds its shape and carries a substantial case.
Which strap do you recommend for the Omega Railmaster 2812.52.31?
A 21 mm box calf. You'll find it ready in the 21 mm collection. If you'd rather have something built on your wrist, the Casati atelier.
More Railmaster
- Seamaster Aqua Terra 150M Co-Axial 39.2 Railmaster Yellow Gold / Bracelet20 mm
- Seamaster Aqua Terra 150M Co-Axial 39.2 Railmaster Yellow Gold / Bracelet / China Train20 mm
- Railmaster Omega Co-Axial Master Chronometer 38 / 60th Anniversary19 mm
- Railmaster Omega Co-Axial Master Chronometer 38 / 60th Anniversary / Trilogy Set19 mm
- Railmaster Omega Co-Axial Master Chronometer 40 Stainless Steel / Grey / Bracelet20 mm
- Railmaster Omega Co-Axial Master Chronometer 40 Stainless Steel / Blue / Bracelet20 mm
- Railmaster Omega Co-Axial Master Chronometer 40 Stainless Steel / Silver / Bracelet20 mm
- Railmaster Omega Co-Axial Master Chronometer 40 Stainless Steel / Grey / Strap20 mm
All Railmaster → Omega families →
Every Railmaster reference with its measured lug width, on watchbands.ai →
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