Peseux 320

Peseux 320
Peseux 320


One of the most successful (and some even say, it is one of the most beautiful) flat handwindig movements is the Peseux caliber 320. With a height of only 3mm with or without shock protection it is really unique, concerning the height.
This work can handle all gears and trains in one layer, since it only has got a possible decentral, direct driven, second hand.

more recent version with shock protection
more recent version with shock protection

Since this movement was built over a longer period of time, it was available in different versions, which can be distinguished on the balance (screw balance, simple three-leg ring balance), shock protection (without or with Incabloc), with our without moveable hairspring stud and with or without decentral second hand train on "6"

On the dial side, the Peseux 320 looks very cheerful. Lots of free space and a yoke winding system.

dial side view
dial side view

Technical data

Number of jewels17
EscapementAnchor with pallets
BalanceNickel screw balance
Shock protection(s)Incabloc,none
Balance cock directionclockwise
Hairspring studfixed/moveable
Regulator typeLong regulator arm,Hairspring key
Movement constructionFork
Escapement wheel, Fourth wheel, Third wheel
Center wheel, Mainspring barrel
Winding mechanismyoke
Setting lever spring5 holes
FunctionsHour, minute(, small second)
Beats per hour18000
Size101/2''' (measured: 23,0 mm)
Image in Flume Werksucher 1962 15

Usage gallery


Ranfft Uhren: Peseux 320 (de) (en) 

The movement in the modern version in copper color with shock protection was donated by Harald Hoeber. Thank you very much!