Front view
Dial, hands and bezel as delivered.
Case-back view
Case-back engraving and, where fitted, the sapphire display.
Movement
Calibre with its finishing and decoration.
On the wrist
Worn shot for proportion and strap drape.
Omega · Railmaster
Omega Railmaster 37 mm Slate Grade
Reference 93410OR.93
Reference at a glance
- Brand
- Omega
- Collection
- Railmaster
- Model
- Omega Railmaster 37 mm Slate Grade
- Reference number
- 93410OR.93
- Year / era
- 1953 · 1950s — pre-quartz mechanical era
- Complication
- Minute repeater
- Movement
- In-house manual-winding
- Case material
- Grade 5 titanium
- Dial type
- Slate grey
- Strap / bracelet
- NATO textile strap
- Water resistance
- 100 m
- Limited-edition status
- Limited edition of 88 pieces
Case, dial & bracelet
- Case dimensions
- 37 mm
- Case thickness
- 11.3 mm
- Case material
- Grade 5 titanium
- Bezel
- Fluted 18k gold
- Crystal
- Sapphire with internal AR treatment
- Dial
- Slate grey
- Hands
- Mercedes hour hand with Chromalight display
- Indexes
- Applied Arabic numerals with luminous coating
- Bracelet / strap
- NATO textile strap
- Clasp / buckle
- Triple-folding clasp with safety catch
- Water resistance
- 100 m
Movement
- Movement / calibre
- Calibre 63A — In-house manual-winding
- Movement type
- High-frequency automatic
- Frequency
- 28,800 vph (4 Hz)
- Power reserve
- 70 hours
- Number of jewels
- 21 jewels
- Complications
- Minute repeater
- Functions
- Flying tourbillon, power reserve
- Watchmaker
- The calibre is built in-house and adjusted in five positions before delivery.
Production & market
- Production period
- 1953 – 1962
- Limited-edition quantity
- 88 pieces
- Current market information
- Trades close to retail on the secondary market, with steady demand for full-set examples.
Designer
Gérald Genta
Gérald Genta (1931–2011) trained as a goldsmith in Geneva and became the most influential watch designer of the 20th century. Working freelance, he sketched the Audemars Piguet Royal Oak overnight in 1970, followed by the Patek Philippe Nautilus, the IWC Ingenieur SL and the Bulgari Bulgari — defining the integrated-bracelet luxury sports watch as a category.
Historical significance
Omega Railmaster 37 mm Slate Grade sits within Omega's Railmaster line, introduced in 1953. It carries the house codes established since 1848 — grade 5 titanium case, slate grey dial and in-house manual-winding — and is one of the references collectors use to date the evolution of the collection.
Interesting facts
- The case is finished by hand, alternating polished and satin-brushed surfaces in a single pass so the edges stay razor sharp.
- The bracelet tapers across its length, which is why the profile looks thinner on the wrist than the specification suggests.
The House
Omega
Brand facts
- Founding year
- 1848
- Founder
- Louis Brandt
- Headquarters
- Switzerland
- Tier
- Luxury
- Major collections
- Speedmaster, Seamaster, Constellation, De Ville, Aqua Terra, Planet Ocean, Railmaster
- Signature technologies
- Hand-applied guilloché dials · Composite and ceramic case materials · Certified chronometer regulation
- Famous movements
- In-house manual-winding · In-house automatic chronograph · In-house automatic, Superlative Chronometer · In-house automatic, chronometer certified
- Notable watches
- Omega Speedmaster 38 mm Slate Sapphire (1961) · Omega Speedmaster 39 mm Blue Quartz (1952) · Omega Speedmaster 44 mm Meteorite 18k (2001) · Omega Speedmaster 36 mm Slate 18k (1981)
Brand history
Omega has spent more than 178 years refining a single idea: a watch should outlive its owner. From the earliest workshop pieces to today's Speedmaster, the house has balanced technical ambition with a recognisable design language, and its collections remain among the most closely followed by collectors worldwide.
Louis Brandt established Omega in 1848, working from Switzerland at a time when precision was measured by hand. The founder's obsession with finishing and accuracy still defines every Omega calibre produced today.
Historical milestones
1848
Louis Brandt founds Omega in Switzerland.
1888
Omega earns its first international recognition for precision timekeeping.
1969
The quartz era forces Omega to redefine mechanical watchmaking.
1990
Omega enters the modern collector market with its signature lines.
2024
Omega continues to produce Speedmaster, Seamaster, Constellation and other icons in limited numbers.