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.
MB&F · LMX
MB&F LMX 38 mm Black 18k
Reference 18433OR.42
Reference at a glance
- Brand
- MB&F
- Collection
- LMX
- Model
- MB&F LMX 38 mm Black 18k
- Reference number
- 18433OR.42
- Year / era
- 2005 · 2000s — modern production
- Complication
- Time and date
- Movement
- In-house automatic with 22k gold rotor
- Case material
- 18k rose gold
- Dial type
- Black lacquer
- Strap / bracelet
- Jubilee bracelet
- Water resistance
- 30 m
- Limited-edition status
- Regular production, not a limited edition
Case, dial & bracelet
- Case dimensions
- 38 mm
- Case thickness
- 12.6 mm
- Case material
- 18k rose gold
- Bezel
- Fluted 18k gold
- Crystal
- Anti-reflective sapphire, double-domed
- Dial
- Black lacquer
- Hands
- Rhodium-plated baton hands with luminous fill
- Indexes
- Applied faceted white-gold indexes
- Bracelet / strap
- Jubilee bracelet
- Clasp / buckle
- Folding clasp in matching case metal
- Water resistance
- 30 m
Movement
- Movement / calibre
- Calibre 54F — In-house automatic with 22k gold rotor
- Movement type
- Automatic, self-winding
- Frequency
- 21,600 vph (3 Hz)
- Power reserve
- 38 hours
- Number of jewels
- 40 jewels
- Complications
- Time and date
- Functions
- Dive time, running seconds
- Watchmaker
- Finishing, assembly and timing are carried out in the manufacture's own atelier.
Production & market
- Production period
- 2005 – 2021
- Limited-edition quantity
- Not applicable
- Current market information
- Thin secondary-market supply — pricing is set piece by piece at auction.
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
MB&F LMX 38 mm Black 18k sits within MB&F's LMX line, introduced in 2005. It carries the house codes established since 2005 — 18k rose gold case, black lacquer dial and in-house automatic with 22k gold rotor — 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 movement's bridges are decorated even where they will never be seen once the watch is cased.
- Early production dials show a slightly different minute track, and collectors pay a premium for them.
The House
MB&F
Brand facts
- Founding year
- 2005
- Founder
- Maximilian Büsser
- Headquarters
- Switzerland
- Tier
- Ultra-Luxury & Haute Horlogerie
- Major collections
- Horological Machine, Legacy Machine, LMX, LM Perpetual, HM11
- Signature technologies
- Composite and ceramic case materials · Anti-magnetic silicon escapement · Shock-absorbing movement mounting
- Famous movements
- In-house tourbillon, manual-winding · In-house automatic micro-rotor · In-house manual-winding, hand-finished · In-house automatic with 22k gold rotor
- Notable watches
- MB&F Horological Machine 42 mm Blue 18k · MB&F Horological Machine 43 mm Ice Quartz · MB&F Horological Machine 40 mm Skeletonised 18k · MB&F Horological Machine 38 mm Salmon Ceramic
Brand history
MB&F has spent more than 21 years refining a single idea: a watch should outlive its owner. From the earliest workshop pieces to today's Horological Machine, the house has balanced technical ambition with a recognisable design language, and its collections remain among the most closely followed by collectors worldwide.
Maximilian Büsser established MB&F in 2005, working from Switzerland at a time when precision was measured by hand. The founder's obsession with finishing and accuracy still defines every MB&F calibre produced today.
Historical milestones
2005
Maximilian Büsser founds MB&F in Switzerland.
2024
MB&F continues to produce Horological Machine, Legacy Machine, LMX and other icons in limited numbers.