News: MB&F Unveils the Horological Machine No.5 RT in Red Gold. A New Limited Edition of Only 66 Pieces.

Press Release

Horological Machine No.5 is back 'On the Road Again', with a new 'RT' limited edition in red gold. After the original HM5 in zirconium presented in 2012, most would wonder why is the manufacture crafting another 66 pieces in red gold? Well, gold is highly resistant to corrosion; it conducts heat or electricity and reflects infrared radiation. Gold is highly malleable: a single gram can be beaten into a sheet of 1 micron. Gold is precious: all the gold ever mined in human history would fit in a cube of just 21 meters on each side. But let's get to the point: the real reason why MB&F is crafting this edition in red gold is because they think it looks damn beautiful!

HM5 RT is full of surprises: Hour and minute displays look straightforward, but they are bi-directional jumping hours with indications inverted, reflected 90° and magnified 20%. HM5 RT has a futuristic case design, but it’s from the 1970s. HM5 RT has a mechanical movement, but inspired by an era when quartz was King. The rear louvers on super cars block light, but on HM5 RT they let light in. Befitting its automotive heritage, HM5 RT has exhaust pipes, but they drain water. The gold endowing the HM5 RT case with such a rich lustrous glow was found on earth, but was actually created billions of years ago in deep space.

While we might still be waiting for flying cars, with the HM5 RT you can put a high-tech golden super car on your wrist! As with any super car, the best often lies under the hood and ‘lifting the hood’ of the HM5 RT case reveals a surprise: an inner case! Like a Russian Matryoshka doll, peeling away one layer reveals a second case in titanium. The reason for housing the Engine in an inner container is for water resistance. Those super car louvers let in water as well as light —the reason for those dual exhaust ports— so to protect the high-performance Engine from moisture as well as shocks, it is housed in its own titanium shell. This inner case is similar to the rigid chassis of a car on which the external coachwork/body is attached. Jean-François Mojon, Vincent Boucard and the team at Chronode developed the HM5 Engine. It may appear simple, but it’s complicated! Jumping hours are bi-directional, enabling the time to be easily set both forwards and backwards. The two mineral glass disks of the hours and minutes are supported by a flat wide bridge. The disks overlap to maximize their diameter and space for large legible numerals. Turning HM5 RT over reveals the Engine, with its 22k gold battle-axe shaped ‘mystery’ winding rotor, fast oscillating balance and stunning hand-finished bridges, through a sapphire crystal display back that is set into the water resistant container.

Horological Machine No. 5 RT retains all the key features of  the HM5: a hand-finished automatic movement with bi-directional jumping hours; a vertical time display reflected and magnified by a sapphire crystal optical prism; 'light convector' flaps which allow to charge the superluminova hour and minute discs and to compensate for the higher weight of the external red gold case, they've modified the inner protective compartment from stainless steel to titanium. While HM5 RT has a generously sized 51.5mm x 49mm case and gold is known for its weight as much as its beauty, thanks to the discrete use of ultra-light titanium, HM5 RT is a very comfortable machine to wear.

Technical Specifications


Three-dimensional horological engine developed by Jean-François Mojon and Vincent Boucard of Chronode. Powered by a Sowind gear train. Battle-axe 22k gold ‘mystery ’ automatic winding rotor.

Power reserve: 42 hours

Balance frequency: 28,800bph/4Hz

Number of components: 224

Number of jewels: 30

Engine housed in a water resistant, titanium inner container


Minutes and bi-directional jumping hours displayed by reflective sapphire crystal prism with integrated magnifying lens. Slide to open/close louvers on case top.


18K Red gold and titanium with internal water resistant titanium engine container. Slide button to open/close louvers. Exhaust ports to drain water.

Dimensions: 51.5mm x 49mm x 22.5mm

Number of components: 80

Water resistance of engine container: 30 meters


Smoked optical grade sapphire crystal with anti-reflective coating and 20% magnification. Sapphire crystal on back with anti-reflective treatment on both faces.


Sculptured rubber strap, titanium tang buckle.


Sticker Price $82,000 USD. For more info on MB&F click here.