Omega Seamaster Railmaster Co-Axial Master Chronometer Small Seconds 38 mm

235.10.38.20.13.001

Omega Seamaster Railmaster Co-Axial Master Chronometer Small Seconds 38 mm reference 235.10.38.20.13.001 is a sport-elegant watch with a 38mm stainless steel case, 12.4mm thick, 44.9mm lug to lug, powered by the Omega 8804, with 55h of power reserve, water resistant to 150m, in production as of November 2026.

Diameter

38mm · manufacturer

Thickness

12.4mm · manufacturer

Size

Compact

Lug to lug

44.9mm · manufacturer

Water resistance

150m · manufacturer

Movement

Omega 8804 · manufacturer

Type

Sport-Elegant · manufacturer

Case material

Stainless Steel · manufacturer

Case shape

Round · manufacturer

Dial

Brown · manufacturer

Dial finish

Gradient · manufacturer

Complications

Small Seconds · manufacturer

Crystal

Domed scratch-resistant sapphire crystal with anti-reflective treatment on both sides · manufacturer

Power reserve

55h · manufacturer

Straps

Integrated Bracelet · manufacturer

Certifications

Master Chronometer, COSC Chronometer · manufacturer

Origin

Swiss (Heritage)

Era

Contemporary · manufacturer

Manufacturer: from the brand’s own product page. Corroborated: the same figure found on two or more independent pages. Entered by Horowell: chosen by a person at Horowell. Unverified: from another source, not yet checked.