Triple Certified Observatory Chronometer
Precision beyond compare
A true rarity in haute horlogerie, the LEDERER Triple Certified Observatory Chronometer stands as a tribute to timekeeping at its most exacting. Certified by three observatories — in addition to COSC — it reaches a level of precision few watches ever attain.
Achieving a deviation of just +0.18 seconds per day, far beyond COSC’s allowance, this chronometer is not just accurate — it redefines the standard. At its heart beats the Central Impulse Chronometer movement, powered by twin barrels, dual gear trains, constant-force mechanisms, and a double-wheel escapement — all engineered for perfect isochronism.
Crafted from 904L stainless steel with a 44mm polished case and a solid sterling silver dial, this timepiece draws from the legacy of marine navigation. A compass rose engraved on each caseback marks its direction — and its rarity — with only eight pieces ever made.
A masterpiece of precision, history, and horological discipline.
Technical Information
Case diameter:
44 mm
Case thickness:
12.2 mm
Case Material:
904L highly corrosion-resistant Stainless Steel
Movement:
Mechanical with Manual Winding
Lens:
Sapphire Crystal Caseback
Water-resistance:
3 ATM
Country of Manufacture:
Switzerland
Color:
Made in-house from solid Sterling Silver