The 10 1/2 ligne FHF 1156 is a very old manual wind movement, probably from then 1920ies. It still reminds of a pocket watch movement, which were ubiqutuous at that time.
All important bearings contain synthetic rubies, in total uses this movement 15 jewels, the maximum of that time.
Like on many old movements, the escape wheel is beared under an own cock.
The gear train with its expensively executed gears are typical for the early time. The central minute wheel which is directly driven by the mainspring barrel, is followed by the third wheel, seconds wheel and escape wheel.
The non shock protected screw balance beats contemporarily slow with 18000 A/h and regulates a swiss pallet lever movement. Its precise frequency is adjusted with a long regulator arm and a scale on the balance wheel cock.
A little oddity on this movement is the crown wheel, which has got two gearings, the normal outer sprocket and a gearings on its lower side, which is connected with the winding pinion.
The FHF 1156 has got a yoke winding system.
On the dial side, it is also stamped as “FHF 1”.
|Size:||10 1/2''' (measured: 23,25mm)|
|Number of jewels:||15|
Nickel screw balance|
|Balance bearing / direction hairspring:||Clockwise|
|Adjust mechanism:||Long regulator arm|
|Winding mechanism:||yoke winding system|
|Setting lever spring:||2 hole(s)|
Flume: 1947 27|