MB&F HM9 Sapphire vision

MB&F has created a number of fantastically intricate horological masterpieces, always looking to push the boundaries further and further. The MB&F Horological Machine No.9 or HM9 for short is one of those masterpieces.

Inspired by the automotive and aviation designs of the 1940s and 50s creating a case like none other that has been seen before. To take it one step further, Maximilian Büsser decided to encase the movement in a sapphire case.

An outer hull of sapphire crystal and precious metal, curved and bubbled and precisely fitted together in three parts, is sealed with a proprietary combination of patented three-dimensional gasket and high-tech compound bonding process to elegantly show off the 301 piece movement inside. It uses two independent cantilevered balances to 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 back of the case, co-axial beneath each of the balances are propellers: twin turbines that spin freely as an element of pure visual interest.

Limited to five pieces per edition, there is the choice 18K 5N+ red gold frame, combined with a NAC-coated black or PVD-coated blue engine, and two editions with 18K white gold frame, featuring a PVD-coated purple or red gold-plated engine. Each model costs 420,000 CHF which equates to £346,779.