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Moritz Grossmann Hamatic Rose Gold Opaline Dial

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$ 46,800.00
SKU MG-002302
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The HAMATIC, the first self-winding watch from Moritz Grossmann, draws its kinetic energy from an external source. A pendulum-style hammer weight skillfully 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. The HAMATIC is available in 18k rose (shown) or white gold with a choice of straps and fasteners.

Ref. MG-002302
To inquire about availability please phone 303.572.1111

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 a perpetual motion machine, but it's still safe to say that the HAMATIC is one of the most beautiful and complex examples of would-be perpetual motion.

Moritz Grossmann timepieces sell very quickly. If interested in one of these watches please reach out to Jeremy: to be updated with availability.


- Manufactory calibre 106.0
- Automatically wound
- Adjusted in five positions
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 hand-setting
- Hours and minutes
- Subsidiary seconds with stop seconds
Number of parts
38 jewels, of which 3 in screwed gold chatons
Lever escapement
- Shock-absorbed Grossmann balance with 4 inertia screws and 2 poising screws
Diameter: 10.0 mm
21,600 semi-oscillations/hour
Power reserve
72 hours when fully wound
Operating elements
- Crowns in 750/000 gold for winding the watch and setting the time
Case dimensions
- 41.0 mm diameter
- 11.35 mm height
Movement dimensions
- 36.4 mm diameter
- 5.15 mm height
750/000 gold
Opaline with Roman numerals, solid silver
- Annealed to a brown-violet hue
- Hand-crafted
- Polished steel
Crystal/display back
Sapphire crystal, antireflective coating on one side
Hand-stitched alligator leather with folding clasp, or pin buckle

Oster Jewelers is an authorized Moritz Grossmann Retailer