Omega Railmaster 220.10.40.20.03.001
The Omega Railmaster 220.10.40.20.03.001 takes a 20 mm watch band.

Omega · Railmaster
- Lug width
- 20 mm
- Case diameter
- 40 mm
- Reference
- 220.10.40.20.03.001
- Family
- Railmaster
- Case material
- Acciaio
- Model
- Railmaster Omega Co-Axial Master Chronometer 40 Stainless Steel / Blue / Bracelet
- Year
- 2018
Bands that fit
Cut and stitched in Milano, in the width this watch takes.
Will a strap close on your wrist?
Set for this watch: 40 mm of case and 20 mm between the lugs. Add your wrist and see where a standard strap would close.
mm
Filled in with the case diameter, which is what we hold for this reference. Measure the watch tip to tip for the exact answer: it is usually a few mm more.
Enter your wrist measurement to see whether a standard 75/115 mm strap closes on you, and where.
Sizing notes
- 20 mm is the gap between the lugs, so a 20 mm band goes in without adapters. Whether it sits flush against a 40 mm case depends on how that case is shaped.
- Inside the Railmaster family the lug width is not one number: it runs 18, 19, 20, 21, 24 mm. This reference is the 20 mm one, so a band bought for another Railmaster may not fit it. Why the size changes inside a family →
- 20 mm is one of the common sizes: 15,081 of the 41,485 watches measured take it, which is why it is the width most bands are cut in. Every watch that takes 20 mm →
Other Railmaster references
- Seamaster Aqua Terra 150M Co-Axial 39.2 Railmaster Yellow Gold / Bracelet2103.52.00
20 mm - Seamaster Aqua Terra 150M Co-Axial 39.2 Railmaster Yellow Gold / Bracelet / China Train2108.52.00
20 mm - Railmaster Omega Co-Axial Master Chronometer 38 / 60th Anniversary220.10.38.20.01.002
19 mm - Railmaster Omega Co-Axial Master Chronometer 38 / 60th Anniversary / Trilogy Set220.10.38.20.01.003
19 mm - Railmaster Omega Co-Axial Master Chronometer 40 Stainless Steel / Grey / Bracelet220.10.40.20.01.001
20 mm - Railmaster Omega Co-Axial Master Chronometer 40 Stainless Steel / Silver / Bracelet220.10.40.20.06.001
20 mm
Same lug width, other Omega lines
- Speedmaster Professional 105.012 (anse a lira asimmetriche)105.012
20 mm - Constellation Co-Axial 35.5 Stainless Steel / Silver / 160 Years111.10.36.20.52.001
20 mm - Constellation Quartz 25.5 Stainless Steel / Diamond / MOP / 160 Years111.15.26.60.55.001
20 mm - Constellation Automatic 36 Stainless Steel / Red Gold / Beijing Olympics 2008111.20.36.10.52.002
20 mm - Constellation Co-Axial 35.5 Stainless Steel / Yellow Gold / Champagne / 160 Years111.20.36.20.58.001
20 mm - Constellation Quartz 22.5 Stainless Steel / Red Gold / Diamond / MOP / 160 Years111.25.23.60.55.003
20 mm
Black Alligator Strap with Light Blue Edges
Red Alligator Strap Water Resistant
Green Rubberized Alligator Strap with Ecru Tribal Stitching
Hammered Calfskin Strap Light Blue
Vintage Olive Green Calf Leather Watch Strap