from 61.500 

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Throughout millennia, researchers and inventors strived to build 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 would 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 unbroken.

Of course, the HAMATIC does not purport to be perpetual motion machine – after all, the first self-winding watch from Moritz Grossmann draws its kinetic energy from an external source. A pendulum-style hammer weight skilfully uses the energy generated through the wearer’s movements to transfer it via the ratchet wheel to 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.

 You can find more details about this product on our official Moritz Grossmann website.


Additional information


Rose gold, White gold


Manufacture calibre 106.0, automatically wound, adjusted in five position

No. of jewels

38, of which 3 in screwed gold chatons

No. of parts



Lever escapement


Shock-resistant Grossmann balance with 4 inertia and 2 poising screws


Diameter: 10.0 mm, Frequency: 21,600 semi-oscillations per hour

Power reserve

72 hours when fully wound

Operating elements

Crown in 750/000 gold for winding the watch and setting the time


Hours and minutes, subsidiary seconds with stop seconds


750/000 gold

Case Dimensions

Diameter: 41.0 mm, height: 11.35 mm

Movement dimensions

Diameter: 36.4 mm, height: 5.15 mm


Opaline with Roman numerals, solid silver


polished, annealed to a brown-violett hue, Hand-crafted, polished steel

Crystal / display back

Sapphire crystal, antireflective coating on one side

Special Features

automatic winding with oscillating hammer, bidirectional click wheels, idler with pawl clicks, manual yoke winder, separately removable clutch winding mechanism, Grossmann balance, Grossmann manual winder with pusher for uncoupling the handsetting mode and restarting the movement, space saving and modified Glashütte stopwork with backlash, adjustment with Grossmann micrometer screw on a cantilevered balance cock, pillar movement with 2/3 plate and frame pillars in untreated German silver, 2/3 plate, balance cock and escape-wheel cock hand-engraved, broad horizontal Glashütte ribbing, 3-band snailing on the ratchet wheel, raised gold chatons with pan-head screws, separately removable clutch winder, stop seconds for handsetting


alligator leather

Strap color

Black, Dark Brown, Blue

Closer material

750/000 gold


Folding clasp, Pin buckle

Strap Length

XS (-1 cm), Normal, XL (+1 cm)