MB&F Horological Machine No3 Chocolate Frog for The PuristS

Dec 09, 2010
To celebrate the 10th anniversary of The PuristS, MB&F created the HM3 Chocolate Frog. The amazing timepiece, limited to just 10 pieces, is available exclusively via www.PuristSPro.com. Belonging to the high-end watchmaking, the HM3 Chocolate Frog immediately makes one feel its playful spirit.

With help of its protruding eyes, the frog can see in different directions, without turning its head. The Horological Machine No3 Chocolate Frog boasts bulbous domes that make the time legibly seen from different angles, without turning ones wrist. While HM3 has the hour and minute hands rotating around their respective stationary cones, the Frog features the aluminum domes rotating under the sapphire crystals.

While creating the rotating domes, the creators of the Frog met a number of technical challenges. They chose solid aluminum characterized by optimal strength to weight ratio for producing the hour and minute domes. The weight of the domes is about 0.5g. First the domes were milled from the outside and then from the inside- as a result their walls boast paper-thin thickness of 0.28 mm. This way the MB&F team reduced their energy needs to an absolute minimum.

The creation of the semi-spherical sapphire crystal domes also required a lot of efforts as any minor imperfection in the sapphire could lead to a disconcerting magnification effect. The sapphire was shaped and polished, having become perfectly uniform.

The MB&F team developed a new gear train for the HM3 engine as the aluminum hour dome of the Frog wristwatch rotates in 12 hours, while the HM3 hour hand performs the 24 hour revolution. With the oversized date wheel being driven from the hours, the watchmakers also reworked the gearing driving the date.

The lightweight titanium case of the Chocolate Frog stands out by its appealing chocolate PVD-coating. It houses the high-tuned engine demonstrating fine hand-finishing. The figure 8 engraved around the domes mirrors the form of the display back that shows off dual ceramic bearings. Pay attention to such original details as clover-head white gold screws and an engraved arrow that indicated the over-sized date.

The Chocolate Frog wristwatch also paralyzes the glance the 22K gold battle-axe winding rotor and the intricate nature of the movement beneath.

The Horological Machine No3 Chocolate Frog watch is presented on a black hand-stitched alligator leather strap fitted with 18K red gold and titanium custom-designed deployment buckle.

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posted by: / Dec 09, 2010

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