Introducing The Chronomètre FB 2RSM.2-1
The Chronomètre FB 2RSM.2-1 from Ferdinand Berthoud combines a tourbillon regulator with a fusee-and-chain transmission system to deliver precision and consistency across extended wear. The constant-force mechanism of the fusee-and-chain ensures rate stability that conventional spring-only designs cannot match.
A Marvel of Engineering
The FB 2RSM.2-1 distinguishes itself through its integration of proven horological principles. The tourbillon cage addresses positional variance in the balance assembly, while the fusee compensates for spring-set degradation by delivering uniform force to the going train. Together, these systems work to limit the amplitude deviation and isochronal error that plague thinner movements.
A Closer Look at the Design
The case proportions and dial layout reflect Ferdinand Berthoud’s heritage in marine chronometry. The sub-dial arrangement provides readability of the chronometer function, while the open caseback reveals the regulation assembly and balance cock—hallmarks of 18th-century manufacture practice adapted for the modern collector. The finishing follows Vallée de Joux standards: perlage on plates, hand-beveled bridges, and polished pivots.
Why You Should Invest in This Timepiece
Ownership of the Chronomètre FB 2RSM.2-1 represents acquisition of a contemporary piece rooted in Ferdinand Berthoud’s documented timekeeping achievements. The movement displays the technical vocabulary of classical chronometry while meeting contemporary COSC certification thresholds. For collectors focused on watchmaking lineage and mechanical coherence, this model delivers both provenance and performance specification.
For those interested in further exploring magnificent pieces by this remarkable brand, click here to explore FERDINAND BERTHOUD’S collections.
Frequently Asked Questions
What makes the Chronomètre FB 2RSM.2-1 unique in terms of its mechanical features?
The Chronomètre FB 2RSM.2-1 combines a tourbillon regulator with a fusee-and-chain transmission system. The fusee delivers constant force to the going train, compensating for mainspring degradation and maintaining consistent rate delivery across the power reserve.
How does the tourbillon function in the Chronomètre FB 2RSM.2-1?
The tourbillon cage rotates once per minute, averaging positional errors in the balance and hairspring assembly to reduce the effect of gravitational variance on timekeeping rate.
Why is the Chronomètre FB 2RSM.2-1 considered a worthwhile investment?
The watch represents contemporary manufacture rooted in Ferdinand Berthoud’s documented chronometer practice. It achieves COSC-level performance while displaying the technical construction methods of 18th-century marine chronometry, making it relevant both as a functional instrument and historical reference piece.
