In-house built caliber DUW 4401

The first NOMOS caliber with the in-house built NOMOS swing system, distinguished by its blued balance spring. It is at work in the new model Metro and in Tangente Datum Gangreserve. Some of the technical details: manual winding, date and power reserve mechanism, both patented, movement individually numbered on the three-quarter plate, 23 jewels, fine adjustment in six positions, Glashütte sunburst decoration and NOMOS perlage.

See data


DUW 4401—NOMOS caliber with manual winding, date and power reserve indicator; NOMOS swing system with tempered blue balance spring

14 ¼ lines (32.1 mm)
including movement holder

Movement height
2.8 mm

Power reserve
ca. 42 hours

Decentralized seconds, patented power reserve indicator, stop seconds mechanism, Glashütte three-quarter plate, 23 jewels, Glashütte stopwork, Incabloc shock protection, adjusted in six positions, tempered blue screws, rhodium-plated movement surfaces with Glashütte ribbing and NOMOS perlage, ratchet and crown wheel with Glashütte sunburst decoration