A NOMOS caliber with swing—since DUW 4101 also features the groundbreaking escapement that has become famous: the NOMOS swing system (recognizable by the blue balance spring). With this component, described as “a moon landing” by the press, our Glashütte-based watchmaking company broke the Swiss monopoly on production in 2014. That’s not all, as this caliber also features NOMOS’ patented date mechanism. It is at work within NOMOS models such as Metro 38 date and Orion 38 date.


In-house built caliber
DUW 4101 (adjusted according to chronometer values)
in-house built NOMOS caliber with manual winding and date indicator
movement height
2.8 mm
14 ¼ lines (32.1 mm)
Power reserve
up to 42 hours
Special qualities

patented date mechanism
NOMOS swing system
blue balance spring
stop-seconds mechanism
Glashütte stopwork
Glashütte three-quarter plate
DUW regulation system
adjusted according to chronometer values
23 jewels
tempered blue screws
rhodium-plated surfaces with Glashütte ribbing and NOMOS perlage
ratchet and crown wheel with Glashütte sunburst