Omega

Railmaster Co-Axial Master Chronometer 40mm | Ref. 220.10.40.20.01.001 | Open-Dated Full Set

$3,540.00

Sold Unavailable

The pure, unpretentious definition of industrial anti-magnetic tool-watch heritage. This 40mm Omega Railmaster Ref. 220.10.40.20.01.001 features a striking vertically brushed black dial with vintage-toned Super-LumiNova indices and a crosshair center layout. A complete Full Set in very good condition with an open-dated international warranty card, it is powered by the METAS-certified automatic Master Chronometer Calibre 8806 offering a 55-hour power reserve and absolute magnetic resistance up to 15,000 gauss. Fully brushed in stainless steel with 150m water resistance, this stealth daily companion represents pure horological utility.

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Standard Delivery (Est. 1–3 Days) – Free
All shipments are sent via fully insured secure delivery service.
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Return Policy (Pre-Owned Watches)

We specialize in pre-owned luxury timepieces.
• Returns accepted within 3 days of delivery
• Item must be in the same condition as received
• Must include all original accessories (box, papers if applicable)

All returns are subject to inspection prior to refund approval.

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Our Guarantee

✔ 100% Authenticity Guarantee – All watches are fully verified and authentic
✔ Mechanical Condition Guarantee – Each timepiece is tested and confirmed to be in proper working condition

Railmaster Co-Axial Master Chronometer 40mm | Ref. 220.10.40.20.01.001 | Open-Dated Full Set

$3,540.00

Product Specifications

MODEL

Railmaster Co-Axial Master Chronometer 40mm | Ref. 220.10.40.20.01.001 | Open-Dated Full Set

REFERENCE NUMBER

220.10.40.20.01.001

SCOPE OF DELIVERY

Full Set (Original Luxury Omega Presentation Box, AD-Stamped Open-Dated International Warranty Card, Master Chronometer Card, Pictogram Card, Manuals)

CASE DIAMETER

40mm Diameter / ~12.6mm Industrial Profile (Fully Brushed Stainless Steel)

CASE SIZE

40mm

MOVEMENT

Omega In-house Co-Axial Master Chronometer Calibre 8806 (Automatic / METAS Certified / No-Date Symmetry)

STRAP MATERIAL

Original Fully-Brushed Stainless Steel Bracelet with Butterfly Folding Clasp

Physician-Led Vetting

Every piece authenticated in-hand by our medical-grade vetting team.

Authenticated

Verified against brand archive: serial, calibre, dial, and case.

Insured Shipping

Fully insured worldwide delivery via FedEx and UPS Premium.

Honeyrock Guarantee

Authenticity and condition guaranteed in writing on every sale.

Product Description

The Story

First introduced in 1957 alongside the Seamaster 300 and the Speedmaster, the Omega Railmaster was engineered specifically for scientists, railway technicians, and nuclear engineers working in environments with severe magnetic interference. The reference 220.10.40.20.01.001 represents a modern, stealth-luxury reimagining of that utilitarian heritage. By replacing shiny polished surfaces with a completely brushed steel finish, it avoids mainstream luxury bling to deliver a quiet, industrial statement piece tailored for the enthusiast who values functional independence, magnetic immunity, and historical tool pedigree over corporate flashiness.

The Craft: Brushed Industrial Design & The METAS Calibre 8806 Engine

The 40mm stainless steel case features an entirely satin-brushed finish, including the bezel and case flanks, eliminating glare and highlighting the rugged geometry of the lyre lugs.

The black dial is a masterclass in texture and legibility, featuring a deep vertical brush pattern that catches light in subtle metallic rays. The dial layout is defined by recessed, vintage-toned "fausse patina" Super-LumiNova triangular hour markers, a subtle central crosshair motif, and transfer-printed Arabic numerals at 3, 6, 9, and 12. Free from a date window, it maintains absolute visual symmetry.

Beneath the solid, oriented NAIAD Lock caseback beats the unstoppable In-house Co-Axial Master Chronometer Calibre 8806. Certified by METAS (the Swiss Federal Institute of Metrology), this automatic movement features a silicon balance spring and non-ferromagnetic components that render it immune to extreme magnetic fields up to 15,000 gauss. Operating with chronometric accuracy of 0/+5 seconds per day, it delivers a 55-hour power reserve, supported by a screw-down crown for a professional rating of 150 meters (500 feet) of water resistance.

Condition & Open-Dated Presentation Set

This collector-favorite Railmaster is presented in Very Good overall condition. The sapphire crystal, dial, bezel, and steel case flanks are in immaculate shape, with only light, honest desk-diving micro-hairlines present on the brushed steel bracelet links from careful previous wear.

The timepiece arrives as a True Complete Full Set, complete with its original Omega inner wooden presentation box, outer packaging, operating manuals, Pictogram card, METAS Master Chronometer card, and the original international warranty card—which is officially AD-stamped and left open-dated, maximizing long-term protection. Fully inspected and verified for timing precision, this 40mm black-dial tool classic is backed by our 1-year Honeyrock mechanical warranty.