Bernhard Lederer Triple Observatory Chronometer

Bernhard Lederer presented the Triple Observatory Chronometer certified by the observatories of Besancon, Glashütte and Geneva. Price CHF 146,000

Independent watchmaker Bernhard Lederer continues his pursuit of the highest possible precision in mechanical watchmaking with  his latest creation, the Triple Observatory Chronometer.

Tested and certified by four prestigious institutions, this timepiece sets a new standard offering a maximum deviation of only +0.5 seconds per day across five positions, far surpassing the permissible limit of 8 seconds. And its average deviation is just 0.18 seconds per day, well below the 6 seconds allowed.

Housed in a 44 mm x 12.2 mm case in polished 904L stainless steel, this model is powered by a 210-part hand-wound movement operating at a frequency of 3 Hz (21,600 vibrations per hour) and characterised by Lederer's natural escapement, composed of two escapement wheels operating in alternation. 

These are installed at the end of two separate gear trains, each with its own barrel, 10-second remontoir d'égalité (a constant-force mechanism), and an anchor whose geometry has been designed to reduce contact timing. 

The two remontoirs ensure accurate time is maintained throughout the power reserve without variation in accuracy as the mainspring barrel unwinds.

The solution designed by Lederer makes the transmission of energy to the balance wheel as uniform as possible. This design improves chronometer performance, enhances rate stability across the entire power reserve, and extends the watch mechanism's longevity.

Made in-house from solid sterling silver, the dial features a small seconds sub-dial inscribed with the coordinates marking the locations of the three observatories in Besançon (France), Glashütte (Germany), and Geneva (Switzerland), where the Lederer Triple Certified Chronometer undergoes its rigorous testing and six-month certification process. 

The dial also showcases the “V” symbol, inspired by the meridian sign. 

To highlight the inspiration from marine chronometers, instruments that were essential for navigators, each Lederer Triple Observatory Chronometer features an engraved Compass Rose with the eight main directions, revealing the series limitation to 8 pieces. Each of the 8 watches is individually marked with one of the cardinal directions. All components are decorated by hand from all sides.

Water resistant to 3 ATM (30 metres / 100 feet), the new Bernhard Lederer Triple Observatory Chronometer, ref. CIC 9012.10.710, has a price of CHF 146,000. ledererwatches.com

Suggested reading:

- Bernhard Lederer Central Impulse Chronometer 9012