MB&F presents Horological Machine No3 Frog. Haute horlogerie is (usually) a very restrained and serious business; however one of Maximilian Büsser’s main goals in creating MB&F was to bring a child's sense of awe and playfulness into high-end watchmaking. There is no doubting that with the HM3 Frog series MB&F have certainly achieved that aim… and more!
The protruding eyes of real-life, amphibious frogs enable them to see in many directions without having to turn their head. The bulbous hour and minute domes of HM3 Frog create a similar effect, though in this case it means the wearer can easily read the time from a variety of angles without having to turn his or her wrist.
Rotating domes of this size and shape posed MB&F with a number of technical challenges. The hour and minute domes are machined from solid aluminium, chosen for its optimal strength to weight ratio. The domes weigh in at a micro-light 0.5g. They are milled first from the outside and then the inside to arrive at a paper-thin wall thickness of just 0.28 mm, which reduces their energy requirements to an absolute minimum.
Even the fabrication of the semi-spherical sapphire crystal domes was incredibly demanding and only recently even possible at all. This is due to the fact that any slight imperfection in the sapphire might introduce a disconcerting magnification effect. The sapphire has to be shaped and polished to be perfectly uniform.
The Frog may portray the time in a playful manner, but there is nothing but serious and meticulous attention to detail and care regarding the fine hand-finishing of the highly-tuned, Jean-Marc Wiederrecht-designed engine. A close inspection of the case is rewarded with carefully thought out detailing including a figure 8 engraved around the domes that mirrors the form of the display back (revealing dual ceramic bearings); distinctive clover-head screws; and an engraved arrow discreetly indicating the easy to read over-sized date.
HM3 Frog Ti is available in Grade 5 titanium with blue 22k gold battle-axe winding rotor.
HM3 Poison Dart Frog is a limited edition of 10 pieces created exclusively for The Hour Glass, and features black PVD-coated zirconium case, 22k gold rotor and 18k yellow gold screws.
HM3 Fire Frog is a limited edition of 10 pieces in 18k red gold and titanium case, 22k red gold rotor and 18k red gold screws.
18k red gold and titanium case, 18k red gold screws
Limited edition of 10 pieces
Grade 5 Titanium
Poison Dart Frog
Black PVD coated Zirconium with yellow gold
Limited edition 10 pieces
Your watch is equipped with an automatic movementand a screwed-down crown.
If it has stopped, turn the crown anticlockwise to slide the crown out and wind the crown a few turns (clockwise).
« Out » position : turn the crown anticlockwise and slide it fully out. Turn the crown to correct time.
To adjust the date, gently position the supplied tool in the corrector hole, which is located on the right-hand side of the case.
Warning: to avoid damaging the date gear train, do not adjust the date between 8.00 p.m. and 3.00 a.m.