Seamaster Railmaster Co-Axial Master Chronometer Small Seconds 38 mm
235.10.38.20.13.001
How it wears
Wears true to its 38 mm case size
Omega Seamaster Railmaster Co-Axial Master Chronometer Small Seconds 38 mm measures 44.92 mm lug-to-lug on a 38 mm case, a lug-to-lug ratio of 1.18 against a database median of 1.18. That span is shorter than 73% of the 7,421 watches in this database and shorter than 70% of the 487 Omega watches listed.
A flat wrist width of 50 mm (1.97 in) or more keeps it in the balanced range, and from 60 mm (2.36 in) it starts to look compact. Below 44.92 mm (1.77 in) the lugs are likely to overhang the wrist. Flat wrist width is measured straight across the top of the wrist, not around it.
At 12.36 mm thick it sits within the typical range, thicker than 53% of the watches with a listed thickness.
Wrist fit analyzer
Fit reference
Sits comfortably within the wrist width for most wearers.
Sources
- https://www.omegawatches.co.kr/watch-omega-seamaster-railmaster-co-axial-master-chronometer-small-seconds-38-mm-23510382013001
Manufacturer page: 38 mm diameter, 44.92 mm lug-to-lug, 12.36 mm thickness, and 19 mm between lugs.
- https://www.hodinkee.com/articles/the-omega-seamaster-railmaster-refreshed-for-2025
Hodinkee reports 44.9mm lug-to-lug, 38mm case size/width, 12.4mm thickness for Omega Seamaster Railmaster 2025 in “Introducing: The Omega Seamaster Railmaster Refreshed For 2025.”
- https://monochrome-watches.com/2025-omega-railmaster-collection-video-review-specs-price/
MONOCHROME reports 45mm lug-to-lug, 38mm case size/width for Omega 2025 Omega Railmaster Collection in “The 2025 Omega Railmaster Collection (Incl. Video Review).”
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