Felsa 4072

 
Felsa 4072

Felsa 4072

Description

The rarely seen Felsa 4072 is a pretty odd and unique ladies’ watch movement.

The construction layout, visible from the movement side, reminds strongly of an ETA 2410.

Although using a screw balance, this movement already has got a moveable hairspring stud. This combination is pretty rare and maybe used here due to the fact, that this movement shown here was used in a (expensive) L.U.Chopard ladies’ watch and therefor had to be more than a “tick” better than average.

Felsa 4072 dial side

Felsa 4072 dial side

On the dial side, the Felsa 4072 differs very much to the ETA 2410.

The advantage of this unusual construction is that the critical transmission from the second wheel on the movement side to the minute wheel on the dial side is not required and of course, a slipping clutch on the large mainspring barrel is much easier and less error-prone than one of the comparatively small minute wheel.

Finally, this movement uses a yoke winding system, seen on the dial side. But for such a well-made movement, this is standard.

Technical data

Manufacturer:Felsa
Caliber:4072
Number of jewels:17
Escapement:Pallet lever
Balance types: Glucydur screw balance
Shock protection(s): Incabloc
Balance bearing / direction hairspring:Clockwise
Moveable stud:yes
Adjust mechanism:Hairspring key
Construction:
  • lever
  • escape wheel, seconds wheel, third wheel, large driving wheel
  • mainspring barrel
Winding mechanism:yoke winding system
Setting lever spring:2 hole(s)
Functions:hour, minute
A/h:18000
Size:6 3/4''' (measured: 15,5mm)
Literature: Flume: K3 5

Usage gallery

Chopard ladies' watch  (dial only)

Chopard ladies' watch (dial only)

Links