Nomos Xi

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Template:File The Xi (ξ) is an automatic worldtimer or GMT movement from Nomos. It was introduced in 2011 and phased out in 2016, replaced by the DUW 5201.

Overview

The 2005 introduction of the Alpha movement family was an important turning point for Nomos. Although based on the preceding Nomos 1 TSP, it was largely constructed in-house rather than being a refinished ebauche. This was followed in 2006 by the Nomos Epsilon, the first Nomos movement with automatic winding. Both movements feature a gear train similar to the classic Peseux 7001, but placed in a new enclosure based on the classic Glashütte three-quarter plate design. Nomos updated many of the components, adding hacking seconds, and completely reworked the finishing with rhodium-plated surfaces, blued screws, Glashütte Stripes, and Glashütte solar grinding or Langeleist-Perlage.

The automatic movements consist of Epsilon, Zeta (with date), and Xi (with GMT or world time disc). All three movements measure 13¾ ligne (31 mm) in diameter, but Epsilon is thinnest at 4.3 mm. Like the date wheels on the Nomos Beta, Delta, and Nomos Zeta|Zeta]], the Xi places the world time wheel outisde the periphery of the movement rather than stacked between the bottom plate and the dial. This allows the movement to be thinner than usual.

The world time function consists of an outer disc with city names or airport codes for each timezone and a 24 hour wheel at 3:00 for "home time". It is operated by means of a pusher located at 2:00 and adjusted with a second pusher at 8:00 set flush with the case. Each time the main pusher is depressed, the central hour hand and location wheel advances by an hour. The second pusher advances the central hour hand separately from the location wheel, allowing it to be "calibrated" for the base timezone.

A direct successor to the Nomos Xi was introduced in 2014, the DUW 5201 featuring the Nomos Swing System. The Xi calibre was phased out and retired in 2016.

This movement is officially named using the Greek letter "ξ", but Nomos often writes it as "Xi".

Applications

See Also

This movement is part of a family of Nomos movements produced since 2005. The movement is partially made in-house, though the assortment is supplied by a third-party. It was supplanted by the in-house Nomos Swing System family starting in 2014.

External Links

Description:

Self-winding movement, bi-directional winding rotor
Escapement: stone lever
Yoke winding system
Incabloc shock protection

Functions:

Hours, minutes
Small seconds, date
Hacking seconds
World time indication

Data:

13¾ lignes
Ø 31 mm, H 5.7 mm
26 jewels
21,600 A/h
Bi-directional winding central rotor with rocker
Power reserve: 42 hours

Extras:

Glashütte three-quarter plate
Glashütte click
Triovis precision adjustment (regulated in six positions)
Hairspring in Nivarox 1A
Blued screws
Ratchet and double wheel with Glashütte solar grinding
Rhodinated surfaces with Glashütte stripes and NOMOS-Perlage

Production period:

Production: 2011-2016
Successor: DUW 5201