Felsa 700

 
Felsa 700

Felsa 700

Description

Felsa only offered two series of ladies' selfwinding calibers, the series 380 and the series 700.

Th Felsa 700 of the second and last caliber series with rather small with a diameter of 9 1/4 lignes, but it was not the smallest selfwinding movement on the market.

It’s construction is pretty similar to that of its larger brother, the caliber 690.

base plate

base plate

Of course all important bearings contain rubies, here even bombed.

base plate with minute wheel

base plate with minute wheel

The non jewel-beared center minute wheel is located under an own cock.

gear train

gear train

The Felsa 700 uses the classical gear train with directly driven center minute wheel, third wheel (here a double one), seconds wheel and escape wheel.

third wheel

third wheel

The double third wheel drives the indirect center second hand and avoids its fluttering.

side view of the gear train

side view of the gear train

As regulating device, a very beautiful, golden-toned two-leg Glucydur screw balance is used, which beats slowly with 18000 A/h.
Its exact frequency can be adjusted with the help of a long regulator arm.

Two Incabloc shock protections protect the sensitive balance staff against bumps.

lower side gear train bridge

lower side gear train bridge

For reasons of space, there is only one bridge under which both the complete gear train and the mainspring barrel are beared. In addition, that is also the crown wheel mounted on the inside of this bridge.

movement without automatic

movement without automatic

On the top of the gear train bridge you can already see the bearings and recesses for the selfwinding mechanism.

automatic gear train

automatic gear train

As with the “large” Felsa automatic movements, a lever changer is used. Depending on the direction of rotation, it acts on one of the two connected change gears, so that, supported by the pawl on the left change wheel, the right change wheel always rotates in the same direction and over the following multi-plate clutch wheel winds up the barrel wheel.

multi-plate clutch

multi-plate clutch

To disengage the automatic mechanism when winding by hand, the last reduction gear carries a multi-plate clutch. When it rotates in one direction (winding by the rotor) it transmits the power from the outer ring gear to the inner pinion, but it runs freely in the opposite direction (hand winding).

missing oscillating weight

missing oscillating weight

Unfortunately, the rotor axis is broken in this example, but you can clearly see where it would be.

However, the striped decoration of the work is impressive.

lower side of the oscillating weight

lower side of the oscillating weight

The rotor is axle-beared (in a ruby) and has in its outer segment a heavy metal inclusion, probably lead.

Felsa 700: Dial side

Felsa 700: Dial side

On the dial side, the Felsa 700 is quite unspectacular, except for the cap jewel of the escapement wheel bearing (at 6:30 o’clock) and the flat Incabloc bearing (at 9 o’clock).

Of course, this movement uses a yoke winding system, and to save height (at 5.3mm it is relatively high), the edge of the dial side is beveled.

Technical data

Manufacturer:Felsa
Caliber:700
Size:9 1/4''' (measured: 21,0mm)
Height:5,43mm
A/h:18000
Number of jewels:25
Escapement:Pallet lever
Balance types: Glucydur screw balance (two legs)
Shock protection(s): Incabloc
Balance bearing / direction hairspring:Clockwise
Moveable stud:no
Adjust mechanism:Long regulator arm
Construction:
  • lever
  • escape wheel, seconds wheel, third wheel, center second pinion, mainspring barrel
  • center minute wheel
Construction type:solid construction
Winding mechanism:yoke winding system
Setting lever spring:2 hole(s)
Features:
  • SCI (indirect center seconds)
  • AUT (selfwinding)
References: Ebauches: 1953 41
Feilner: 65 6350a
Flume: K1 -
Inventory number:22001

Usage gallery

Schuyler & Ryser Automatic ladies' watch

Schuyler & Ryser Automatic ladies' watch