Mühle-Glashütte Terranaut watches

The Mühle-Glashütte Terranaut is a land watch from a maker of nautical instruments: a family of sports watches meant for biking, hiking and the outdoors rather than the sea. It was already shown by mid-2009 in three versions, numbered I to III, and that numbering carries through to the Trail models: Terranaut I is the chronograph, Terranaut II the 44 mm three-hander and Terranaut III the 40 mm three-hander.

The Trail versions have black dials with Super-LumiNova, steel cases and sapphire crystals; on the I and II the dial is matte black, with lume on the hands and main markers and a grey outer minute track numbered every five minutes. Mühle builds them on Valjoux and Sellita base movements that it reworks with its own rotor and its woodpecker neck regulation.

The Terranaut I Trail (M1-40-53) is a 44 mm chronograph with day and date, built on Mühle's MU 9408, a rebuilt Valjoux 7750 with 48 hours of power reserve. It has a 30-minute counter at 12, a 12-hour counter at 6, and at 9 a running seconds shown not by a hand but by a rotating triangle. It takes a 22 mm strap.

The Terranaut II Trail (M1-40-34/1) keeps the 44 mm case and 22 mm lug width for a time-and-date watch with large numerals at 3, 6, 9 and 12, running on a modified Sellita SW 200-1 automatic. The Terranaut III Trail (M1-40-14/1) uses a modified Sellita SW 200 automatic in a 40 mm case, 10 mm thick, water-resistant to 100 m. References ending in MB are on a bracelet, NB on a strap.