The NOMOS caliber DUW 4301 also features the in-house built NOMOS swing system (that now renowned pacesetter and escapement, recognizable by the blue balance spring). Thanks to its patented NOMOS power reserve indicator, it also reminds you when it’s time to rewind the watch—a practical feature reminiscent of a car’s fuel gauge.

This unusually beautiful and high performance motor is at work within numerous NOMOS watches, such as Tetra Kleene and Tangente power reserve. Like all other hand-wound NOMOS calibers, it is also extremely slender and highly precise.


In-house built caliber
DUW 4301
in-house built NOMOS caliber with manual winding and power reserve indicator
movement height
2.8 mm
10 ½ lines (23.3 mm)
Power reserve
up to 43 hours
Special qualities

patented power reserve mechanism
NOMOS swing system
tempered blue balance spring
stop-seconds mechanism
Glashütte stopwork
Glashütte three-quarter plate
adjusted in six positions
17 jewels
tempered blue screws
rhodium-plated surfaces with Glashütte ribbing and NOMOS perlage
ratchet and crown wheel with Glashütte sunburst