German silver Special alloy composed of copper and zinc, with a nickel concentration of about 10%. German silver is stronger than brass and has been traditionally used by Lange for the manufacture of plates and bridges. The addition of nickel minimises the oxidation of German silver and thus eliminates the need to electroplate the alloy - it can remain "untreated".

Glashütte ribbing A linear decoration. It is produced by a rotating grinding wheel that is slightly inclined and moved along the surface of the workpiece in parallel lines.

Blued steel, blued screws Steel parts are slowly and cautiously heated (annealed) to about 300°C. This process coats the metal with an extremely thin, shimmering film of cornflower-blue magnetite (Fe3O4).

Chamfering Also: angling, bevelling. The breaking and polishing of sharp edges on bridges and levers. The inclined surface has the same width along its entire circumference or length.

Gold chaton The gold setting of a bearing jewel - in Lange watches, chatons are often secured to the three-quarter plate with two or three screws.

Synthetic ruby All references to the term "ruby" mean friction-reducing, wear-resistant jewels made of synthetically produced ruby for bearings, switching elements, and certain clicks. Because the homogeneity of its crystalline structure is better than that of natural rubies without any trade-off in terms of physical and chemical properties, synthetic ruby now dominates virtually all applications where jewels are required.

Three-quarter plate The three-quarter plate was introduced in Glashütte by Adolph Lange in 1864. Since then, it has been a typical feature of Lange watches. It accommodates the counter-bearings of the going train and enhances the stability of the movement.

Nivarox An alloy composed of iron and nickel with additions of chromium, titanium, and beryllium. It is very suitable for the manufacture of hairsprings, or balance springs, due to its antimagnetic and temperature-compensating properties. The addition of beryllium dates back to a patent awarded to Richard Lange. This chemical element enhances the hardness and elasticity of the alloy.

Balance cock Small metal plate screwed to the visible side of the movement. It carries the balance wheel shaft bearing.

Outsize date display Depending on the size of the watch, this useful function makes it possible to display the date up to five times larger than in a conventional watch of similar dimensions. It is based on the patented two-disc mechanism.

Power-reserve indicator The power-reserve indicator displays the state of wind of the mainspring. It reminds the owner that the movement must be rewound again before it stops. Often called "UP-and-DOWN display" by Lange.

Screw balance A balance wheel that has adjustable screws and tiny washers along its rim.

Semi-oscillation Also: vibration. Half of the path travelled by the balance wheel from end point to end point.

Stop seconds Mechanism that stops the balance wheel and thus the movement of the seconds hand when the crown is pulled. This allows a watch to be precisely synchronised with an external time signal.

Whiplash precision index adjuster An adjusting device composed of a steel spring in the shape of a swan's neck, a pointer, and a setscrew. The screw is used to adjust the beat, or the timing, of the watch in very small increments.

"We want to build the world's finest watches again" - this is the self-confident creed of Lange's master watchmakers. With the movement of the LANGE 1, they gave an impressive demonstration of how they interpret this objective. The LANGE 1 unites the finest facets of Saxon watchmaking ingenuity with the utmost in precision mechanical quality. The | three-quarter plate made of untreated | German silver is decorated with | Glashütte ribbing, and edges in the movement are | chamfered and polished. Even the surfaces that ordinarily remain concealed to the eye of the beholder are meticulously finished. A total of 53 synthetic ruby | jewel bearings reduce mechanical friction in the movement to a minimum. Nine of them are held in precious | gold chatons that are secured with | blued screws. The manually wound movement of the LANGE 1 has a | stop seconds feature activated when the crown is pulled, a patented twin-disc mechanism for the display of the | outsize date, and a mechanism that indicates the | power reserve. A | screw balance with a | Nivarox 1 hairspring is responsible for the accuracy of the LANGE 1. It is shock-proofed, executes 21,600 | semi-oscillations per hour, and is adjusted in five | positions. The hand-engraved | balance cock carries the | whiplash precision index adjuster. Its patented beat adjustment mechanism makes it possible to accurately set the impulse pin relative to the pallet fork without removing the balance wheel - illustrating that Lange had future customer service needs in mind when the watch was designed.