Astronomical watchmaking · Since 2000
The Martin Braun EOS 42 displays individual sunrise and sunset times – mechanically calculated and calibrated to its owner’s location.
01The only Martin Braun model still crafted today
A complication unlike any other
Two crossed titanium hands translate the annual course of the sun into an exceptional mechanical display. Sunrise appears on the left, sunset on the right – calibrated individually to your location.
◎Calibrated for your latitude
Astronomy in real time
This neutral technical simulation calculates dawn, sunrise, sunset and dusk for your location. Cams, linkages and linear scales translate the annual cycle mechanically without imitating a watch dial.
Two calculated cams move separate indicators for the morning and evening horizon.
Day length: 15 h 44 min
Location time zone: Europe/Berlin
Technical signature
03The watchmaker behind the sun
Martin Braun represents the third generation of a watchmaking family. Restoring historic calibres, crafting rare replacement parts and studying astronomical cycles led to a watch unlike any before it.
“Time is not only what a watch measures. It is also the light that shapes our day.”
Awarded innovation
The EOS and its astronomical successors attracted international attention early on. Historical distinctions are presented factually and without unverified award logos.
2nd place · Chronos – Technical Innovation
3rd place · WatchTime – Technical Innovation
Innovation award in the USA
Source: Martin Braun / Schaumburg Watch brand archive; Chronos and WatchTime historical references.
Historic masterpieces
!Historic models – no longer regularly available
These models document the evolution of the marque. They are no longer produced and are shown exclusively as part of Martin Braun’s watchmaking heritage.
Sunrise and sunset – individually configured for its owner.
Sunrise and sunset – individually configured for its owner.
Sunrise and sunset – individually configured for its owner.
The EOS complication extended by the equation of time.
The EOS complication extended by the equation of time.
One of the marque’s most complex astronomical constructions.
One of the marque’s most complex astronomical constructions.
Personal to your location
Every new EOS is calibrated to the desired location or latitude. For existing EOS watches, we provide consultation, service and technical restoration from a single source.