First seen in 2018, MB&F’s Horological Machine N°9 – nicknamed HM9 ‘Flow’ – was a tribute to the extraordinary automotive and aeronautic designs of the 1940s and 50s.
The latest iteration of HM9 is the ‘Sapphire Vison’ – with an outer hull of sapphire crystal and precious metal, curved and bubbled, fitted together in three parts, sealed with a proprietary combination of patented three-dimensional gasket and high-tech compound bonding process.
Two fully independent cantilevered balances channel data into a differential that turns two heartbeats into one coherent time-pulse. Ultra-precise conical gears efficiently turn the engine’s energy and information current through a 90° angle to feed the time display on a sapphire crystal dial, marked with Super-LumiNova.
On the reverse, co-axial beneath each of the balances are propellers: twin turbines that spin freely as an element of pure visual interest, waiting for someone to begin a new type of exploration. HM9-SV takes us to the depths of the ocean.
“The most beautiful movement we’ve created to date.”
Maximilian Büsser, Founder, MB&F (describing the engine inside HM9)
In order to seal the sapphire crystal exterior components into one watertight case, new solutions had to be created. A patented three-dimensional rubber gasket was already used in the original HM9 Flow to ensure water resistance when the tripartite case was bolted together.
HM9-SV – TECHNICAL SPECIFICATIONS
HM9 Sapphire Vision comes in four editions, each limited to only five pieces:
Two editions with 18K 5N+ red gold frame, combined with a NAC-coated black or PVD-coated blue engine;
Two editions with 18K white gold frame, featuring a PVD-coated purple or red gold-plated engine.
Engine
Manual-winding in-house movement
Two fully independent balance wheels with planetary differential
Frequency: 2.5Hz (18,000bph)
Single barrel with 45-hour power reserve
301 components, 52 jewels
Hours and minutes on vertical dial display
Dual spherical turbines under the movement
Shock-absorbing helicoidal springs linking the movement to the case
Case
‘SV’ editions in sapphire crystal with frame in 18K white or red gold (5N+).
Hour/minute dial in sapphire crystal with anti-reflective treatment and Super-LumiNova on the numbers and indexes.
Dimensions: 57mm x 47mm x 23mm
52 components
Water resistant to 3ATM (30m)
Unique assembly process of the three sapphire crystal case parts with a patented three-dimensional gasket and high-tech bonding compound.
Sapphire crystals
Total of five sapphire crystals treated with anti-reflective coating: three crystals for the main components of the case, one crystal covering the dial, and one crystal for the dial itself.
Strap and buckle
Hand-stitched brown or black alligator strap with red or white gold folding buckle matching the case.
For more information please visit https://www.mbandf.com/en