Sefea 50

 
Sefea 50 | 17jewels.info - The Movement Archive

Sefea 50

Description

The Sefea 50 is a 11 1/2 ligne manual wind movement from France, which was already available by the former manufacturer as Judex 50.

Sefea 50: base plate

base plate

The base plate already shows, that we have a very common construction here: Directly driven center minute wheel, directly driven center second wheel, pallet lever escapement and fully jeweled bearings.

Sefea 50: gear train

gear train

The annular balance is beared in two Incabloc shock protection systems and beats slowly with 18000 A/h and controls a conventional swiss lever movement.

Sefea 50: gear train, side view

gear train, side view

The specimen shown here uses even 21 jewels, since the escapement wheel, center second wheel and third wheel are equipped with cap jewels, and on the dial side, even the lever bearing has got a cap jewel, which is not neccessiary at all, since the lever bearing runs oil-free.

Sefea 50: Sefea 50 dial side

Sefea 50 dial side

Technical data

Manufacturer:Sefea
Caliber:50
Size:11 1/2''' (measured: 25,6mm)
A/h:18000
Number of jewels:21
Escapement:Pallet lever
Balance types: anular balance
Shock protection(s): Incabloc
Balance bearing / direction hairspring:Clockwise
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
Setting lever spring:2 hole(s)
Features:
  • SCD (direct center seconds)
References: Flume: K3 37 (K2 9)

Usage gallery

Sefea 50: Countess mens' watch  (only dial survived)

Countess mens' watch (only dial survived)

Other movements from Sefea