As a contemporary Swiss watchmaker, Arnold & Son continually refines its approach in tribute to the pioneering work of John Arnold. A figure who devoted his life to solving the technical challenges of his time, particularly the accuracy and reliability of timekeeping. Celebrated for producing some of the most precise marine chronometers of the 18th century, he received multiple distinctions from the Bureau des Longitudes, encouraging further advancements in his research into precision horology.
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THREE FOUNDING PRINCIPLES
ASTRONOMY, CHRONOMETRY AND WORLD TIME
Astronomy, Chronometry, and World Time form the core identity of Arnold & Son. Through finely crafted complications and subtle references to its maritime heritage, the Maison continues to draw inspiration from these three founding principles, each one reflecting the enduring legacy of John Arnold.

Arnold &Son
The Heritage
As a distinguished watchmaker, John Arnold created some of the most precise marine chronometers of the 18th century, earning multiple awards from the Bureau des Longitudes that further advanced his pursuit of accuracy in timekeeping. As an inventor, he registered numerous patents, including a compensation balance with a bimetallic balance spring and a helical balance spring featuring terminal curves.
Arnold also established simplified chronometer design principles that enabled the efficient production of these instruments, many of which were supplied to His Majesty’s Royal Navy, positioning him as one of its key providers. Among his most significant yet lesser-known contributions is the modern definition of the term “chronometer”, now used to describe a high-precision timepiece whose movement has successfully passed official accuracy certification by an independent authority.


























