Förster 51

 
Förster 51

Förster 51

Description

In the late 1950ies, the german manufactury Förster released a quite modern manual wind movement for gents’ watches, which already had a screw-less anular balance.

base plate

base plate

As it should be for a good lever movement, all important bearings are here equipped with rubies. Center minute wheel and mainspring barrel don’t run in rubies, since they rotate too slow.

minute wheel with cock

minute wheel with cock

In the fifties, it was state of the art to use a directly driven center minute wheel, which is beared under an own cock.

gear train

gear train

Not only the minute wheel is directly driven, but also the center second wheel.

Side view of the gear train

Side view of the gear train

The Förster 51 uses a screw-less anular balance, which is beared in two inhouse Elastor-Förster shock protections and beats with 18000 A/h. It regulates a conventional pallet lever movement of swiss type.

Förster 51: Dial side

Förster 51: Dial side

The Förster 51 not only uses three cap jewels on the gear train bridge, but also two cap jewels on the dial side, so that in total, 21 jewels are counted. Why the lever axle, which is olied, has got a cap jewel instead of the third gear, is unknown.

Technical data

Manufacturer:Förster
Caliber:51
Number of jewels:21
Escapement:Pallet lever
Balance types: Nickel anular balance
Shock protection(s): Elastor-Förster
Balance bearing / direction hairspring:Counterclockwise
Moveable stud:no
Adjust mechanism:Hairspring key
Construction:
  • lever
  • escape wheel, seconds wheel, third wheel
  • center minute wheel
  • mainspring barrel
Construction type:solid construction
Winding mechanism:yoke winding system
Features:SCD
Functions:hour, minute, second
A/h:18000
Size:10 1/2''' (measured: 23,3mm)
Literature: Flume: 1958 b.32
Inventory number:17040