HM9 'Sapphire Vision' Yellow Gold

BHD 193,000.000
by MB&F

First presented in 2018, Horological Machine N°9 – nicknamed HM9 ‘Flow’ – was inspired by the dynamic profiles of automotive and aviation design from the 1940s and 50s. The result was a case like no other that echoed the epoch’s flowing, aerodynamic lines.

Despite its striking external appearance, the HM9 movement inside was described as the most beautiful movement MB&F had created to date. What other logical step was there to take, if not to encase the engine in a transparent sapphire crystal shell?

The result is Horological Machine N°9 ‘Sapphire Vision’ or "HM9-SV": after four initial editions in 2021, two new sapphire crystal editions are presented in 2023: in white gold combined with a blue PVD-coated engine, or yellow gold featuring a PVD-coated green engine - both limited to just 5 pieces.

Technical Specifications


Manual-winding in-house movement.

Two fully independent balance wheels with planetary differential.

Frequency: 2.5Hz (18,000bph).

301 components, 52 jewels.

Dual spherical propellers under the movement.

Shock-absorbing helicoidal springs linking the movement to the case.


Sapphire crystal case with frame in 18K white or yellow gold.

Unique assembly process of the sapphire crystal case parts with a combination of patented three-dimensional gasket and high-tech bonding compound.

Water resistance: 30 m / 90 ft / 3 ATM.


Manual winding with single mainspring barrel.

45 hours.


57mm x 47mm x 23mm


Each edition limited to only five pieces:

- 18K white gold frame, featuring a PVD-coated blue engine;

- 18K yellow gold frame, with PVD-coated green engine


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.


Hand-stitched brown or black alligator strap with white or yellow gold folding buckle matching the case.


Hours and minutes displayed on vertical sapphire crystal dial with anti-reflective treatment and Super-LumiNova on the numbers and indexes.

Why we love it

Experience the allure of innovation and exploration with the HM9 'Sapphire Vision'. Its sapphire crystal exterior harmoniously melds with precious metals, encapsulating a world of intricate mechanics and aesthetics. With independent balances, conical gears, and a 90° energy transformation, it presents time as a coherent pulse on a luminous sapphire dial. Twin turbines beneath the balances beckon exploration, symbolizing the uncharted oceanic depths. HM9-SV: a journey into the extraordinary, where technology and wonder collide.