Collector talk series,F.P. Journe
PH Zhou
The ChronographOur plan
Contents
What is a chronograph?
The name and the early ideas of Pouzait, Moinet and Rieussec
How the mechanisms work
Column wheel, coupling clutch, heart cam, split seconds and flyback
Three classic movements
Valjoux 22, Longines 13ZN and Valjoux 55 VBR
F.P. Journe’s chronographs
Octa Chronographe, Centigraphe, Rattrapante and Monaco
Including the Only Watch comparison, followed by Q&A
The ChronographWhat it is, and how it took shape
What is a chronograph?
A stopwatch function for measuring elapsed time.
The ChronographWhat it is, and how it took shape
Three ideas of the chronograph
Three early ideas: independent seconds, finer measurement and a written record.
The ChronographFive mechanical solutions
Column Wheel
the mechanical control center
The ChronographFive mechanical solutions
The coupling clutch
Connecting timing to a watch that keeps running
The ChronographFive mechanical solutions
The heart-shaped cam
A unique zero, from any starting position
The ChronographFive mechanical solutions
Split-seconds
Holding one finish while timing continues
The ChronographFive mechanical solutions
Flyback
Beginning the next interval in one action
The ChronographThree working movements
Valjoux 22
Start, stop, reset
Drag through 360°. Press the square pushers. Rotate to the movement, then separate its layers.
The ChronographThree working movements
Longines 13ZN
Flyback in the complete movement
Drag the complete watch through 360°. Hold the broad mushroom pusher for flyback.
The ChronographThree working movements
Valjoux 55 VBR
The split-seconds mechanism
Drag through 360°. The crown starts, stops and resets; the square pusher splits and reunites.
The ChronographFour F.P. Journe chronographs
Octa Chronographe
Calibre 1300
The ChronographFour F.P. Journe chronographs
Chronographe Rattrapante
Calibre 1518
The ChronographF.P. Journe · Bonus
Only Watch: a different coupling
The 2017 unique piece and the production watch use different ways to admit power.
The ChronographFour F.P. Journe chronographs
Monaco chronograph
Unique piece, 2026
Q&A
PH Zhou