Moritz Grossmann Benu Hamatic Rose Gold
Throughout millennia, researchers and inventors dreamed of building a perpetual motion machine; a device that would continue to move indefinitely once started. Without any external source of power, it was believed that the machine itself could generate an unlimited amount of energy. It was only with the formulation of the law of conservation of energy in the middle of the 19th century that physics quashed the principle of perpetual motion. Nevertheless, people’s fascination for the concept remained.
While Moritz Grossmann’s HAMATIC calibre does not purport to be a perpetual motion machine (because it draws its kinetic energy from an external source), the cleverly designed concept is fascinating and beautiful and draws inspiration from this dream.
So, how does it work?
Moritz Grossmann’s HAMATIC adopts a pendulum-style hammer weight to convert the energy generated through the wearer’s movements to the ratchet wheel and the mainspring in the barrel, meaning that an external energy source makes the dream of infinite motion come true.
It’s, therefore, safe to say that the HAMATIC is one of the most beautiful and complex examples of ‘would-be’ perpetual motion.
The Benu HAMATIC collection is available in different case materials and dial colours, each reflecting a different style and preference.
The warmth of rose gold, coupled with the opaline white dial and hand-annealed violet hands imbues tradition and charm that reflects the long fascination with time and its manifestations. A collector’s dream that can, and should, be worn and enjoyed each moment.
Manufacture calibre 106.0, manually wound, adjusted in five positions
Grossmann balance; click pawl in reduction gear; adjustment with Grossmann micrometer screw on cantilevered balance cock; pillar movement with 2/3 plate and pillars made of untreated German silver, hand-engraved 2/3 plate and cantilevered balance cock; wide, horizontal Glashuette ribbing, double-band snailing on the mainspring barrel; raised gold chatons with pan-head screws; separately removable clutch winding mechanism; stop seconds for hand setting; automatic winding with oscillating hammer, bidirectional click wheels; idler with pawl clicks, manual yoke winder
Hours and minutes, subsidiary seconds with stop seconds
No. of parts
No. of jewels
38, of which 3 in screwed gold chatons
Shock-resistant Grossmann balance with 4 inertia and 2 poising screws, Nivarox 1 balance spring
Diameter 10.0 mm, frequency 21,600 semi-oscillations/hour
72 hours when fully wound
Crown for winding the watch, and setting the time
Diameter: 41.0 mm, height 11.35 mm
Diameter: 36.4 mm, height: 5.15 mm
Three-part, in 750/000 rose gold
Solid silver, opaline, with printed Roman numerals
Manually crafted, steel, annealed to a brown-violet hue
Crystal and display back
Sapphire crystal, antireflective coating on one side
Hand-stitched alligator leather with pin buckle in 750/000 gold