- Hysek Calibre HW4058
- Automatic Mechanical, hour & minute
- Chronograph with 2 times column wheel
- Double micro-rotor
- Grande Date at 12 o’clock
- Weight on the dial side in rhodium-plated 22K gold
- Small seconds at 9 o’clock
- 45min counter at 3 o’clock
- Direct-drive in the center
- 412 components
- 49 jewels
- Autonomy 45h + 3h
- Frequency 28'800 VpH
This Chronograph version exist also in an evolution named HW4057 where the counters are displayed by a two discs.
Its movement, developed and assembled within the manufacture has been subject to an extensive engineering work to sensibly improve its functionalities, set in action by pieces such as classical column wheel, levers and springs bevelled by hand. The automatic winding of the heart is thus not made by the oscillating classical turning point mass, but by a double micro-rotor integrated into the movement structure itself, visible on the back of the watch as well as on the dial side.
This ludic mass contributes to strengthening the effectiveness of equipment of the barrel chronograph with its heavy weight, and guarantees high autonomy. However, it is undoubtedly the graphic power of this "micro-rotor" oscillating in the arm movements and holding down the dial where counters timed minutes elapsed and permanent seconds emerge, which holds the attention of fans still looking for creations with a strong identity.
The automatic winding of the heart is no longer assigned to an oscillating classical turning point mass, but to a micro-rotor integrated into the movement structure itself. The highly original design of the mechanical structure, made of 412 com-ponents and 49 jewels, is here magnified by the presence on the movement side, of components such as springs, levers or bridges, hand-crafted bevelling