Article of the week
The New Patek Philippe Twenty~4 7340/1R Perpetual Calendar

Introduced in 1999, the Twenty~4 collection was Patek Philippe’s first dedicated line of feminine timepieces. The original model featured an Art Deco-inspired manchette (cuff) design, but in 2018, the brand unveiled the Twenty~4 Automatic, which is a round-cased iteration powered by an automatic movement. This year, Patek Philippe elevates the collection further by introducing a perpetual calendar complication, marking the collection's debut in the realm of Grand Complications.
Crafted entirely in 18K rose gold, the watch features a 36mm case with a slender profile of just 9.95mm, making it sit gracefully on the wrist. The case is meticulously finished with a combination of polished and brushed surfaces, enhancing its refined aesthetic. Two dial options are available. The Ref. 7340/1R-001 features a silvery opaline dial with a vertical satin finish, evoking the texture of shantung silk that feature irregular texture, while the Ref. 7340/1R-010 presents an olive green sunburst dial for a more contemporary appeal.

Glossary

fusee and chain

Mechanism is an old mechanism used in mechanical watches to solve the issue of uneven distribution of power from the mainspring as it transitions from fully wound to relaxed state. The fusee consists of a cone-shaped device connected to the mainspring barrel by a chain.


The purpose of the fusee and chain mechanism is to maintain consistent torque during the movement of the mainspring and ensure equal power distribution. The cone-shaped fusee allows the chain to wrap around it in a way that compensates for the decreasing torque of the mainspring as it relaxes. This results in equal power distribution to the gears of the watch, leading to improved timing accuracy.

Simply put, when the chain is tightened with the necessary force, it supplies the gears with sufficient rotational power to maintain timing accuracy. When the mainspring is in a relaxed state, the effect directed to the gears decreases, allowing the chain to compensate and distribute power evenly to the gears, ensuring the continuity of timing accuracy.

Fusée and chain of the Zenith Academy Georges Favre-Jacot