Freco 9 3/4

 
Freco 9 3/4

Freco 9 3/4

Description

Another difficult to identify movement is this ladies’ watch movement with a diameter of 9 3/4 lignes.

The manufacturers’ name, “Freco”, is embossed into the base plate below the balance cock, and according the few information bits in literature, it is most probably a Freco 9 3/4, maybe also known as “Freco B”.

It dates from the 1920s, but its large gear train bridge already looks pretty modern, in contrast the base plate, which still reminds a lot of those of pocket watch movements:

base plate

base plate

The raw impression of the base plate raises questions. Is this specimen probably a laboratory sample? Anyhow, the quality of the movement is really not bad, and as usual in the 1920s, all important bearings contain rubies.

gear train

gear train

The gear train with its pretty large gears is a standard construction.
The mainspring barrel drives the center minute wheel, followed by third wheel, seconds wheel (at 6 o’clock) and escape wheel.

side view of the gear train

side view of the gear train

The Freco 9 3/4 uses a Guillaume screw balance, which is of course not shock protected. It beats with the usual rate of 18000 A/h and can be regulated with a long regulator arm and scale.

ratchet wheel

ratchet wheel

The ratchet wheel doesn’t have the common square recess, but a three quarters circular one, which is much more difficult to produce and does not offer a real technical advantage.

Freco 9 3/4: Dial side

Freco 9 3/4: Dial side

On the dial side of the Freco 9 3/4, you see the usual sight of an early lever movement with its cut off plate at 9 o’clock.

As keyless works, a yoke winding system with a characteristically shaped setting lever spring is used.

In the lab

The specimen shown here came without case and slightly gummed into the lab and got a simple revision.

Timegrapher result

A good regulation of this movement was not possible, mainly because the balance wheel had a visible vertical stroke. Nevertheless, the results are ok, and the large amplitude in horizontal positions is impressible, although there's a chance, that it is a measurement error, because the lift angle is unknown.

horizontal positions
dial up -23 s/d 324° 1.1ms
dial down +2 s/d 321° 1.2ms
vertical positions
crown right (12 up) -67 s/d 169° 1.4ms
crown up (3 up) -50 s/d 249° 1.5ms
crown left (6 up) -176 s/d 225° 1.7ms
crown down (9 up) -20 s/d 238° 1.6ms

Technical data

Manufacturer:Freco
Caliber:9 3/4
Size:9 3/4''' (measured: 21,9mm)
A/h:18000
Number of jewels:15
Escapement:Pallet lever
Balance types: Guillaume screw balance (two legs)
Shock protection(s): none
Balance bearing / direction hairspring:Clockwise
Moveable stud:no
Adjust mechanism:Long regulator arm
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)
Inventory number:20043

Usage gallery

anonymous ladies' watch (case missing)

anonymous ladies' watch (case missing)