In this collection a button at 2 o'clock starts and stops the needle of seconds sweeping and jumping. The idea goes back to an invention of Ferdinand Adolph Lange in 1867; His son Richard obtained one of the first patents of this function in Germany in 1877. The "movement of a second with a jumping hand", was implemented for the first time in a watch built by his second son, Emil, grandfather of Walter Lange. In general, more than 300 pocket watches were made with this function. Like 1815 "Homage to Walter Lange", the watches had a small seconds hand.
1815 "Homage to Walter Lange" dominates second sweeps and jumpers. The small seconds hand at 6 o'clock performs six small steps as you move from index to index. However, the central blue hand of second sweeps makes precise jumps from second to second. It can be allowed to run continuously or stop on demand. A push button at 2 o'clock starts it and stops it. This is useful for heart rate measurements, for example.
With a box diameter of 40.5 millimeters, 1815 "Homage to Walter Lange" is available in three limited editions: 145 watches in white gold, 90 in rose gold and 27 in yellow gold. These unusual numbers are derived from important landmarks in the history of the Lange family. Since December 7, 1845, when Ferdinand Adolph Lange originally established the company, exactly 145 years passed until December 7, 1990, when Walter Lange registered Lange Uhren GmbH. Precisely 27 years passed between this date and December 7, 2017, just today, which is released the new model that pays tribute to Walter Lange.
The piece of steel is unique and will only be produced once. The latter has a black enamel dial with a railroad minute scale and polished needles. Throughout the collection the newly developed movement has a special hand-caliber designation: L1924, the birth year of Walter Lange. In addition, the first three digits of the reference number 297,078 recall their date of birth, July 29. It has 253 components and 36 rubies. Late at 21,600 alt / h. It has a crown for setting the time and a pushbutton at 2 o'clock for a second stop for sweeping sweeps. It has a sapphire background. In the gold versions, the dial is silver with blue steel hands. The steel version will be auctioned for charity in 2018.
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