AS 1001

AS 1001 | - The Movement Archive

AS 1001


The AS 1001 was with a diameter of only 17mm a movement for ladies' watches. It was launched in the 1940s.

There’s also an export version of this movement, with only seven jewels and the cpde “WXW”, which stands for “Westfield”.

AS 1001: 7 jewel export version

7 jewel export version

As common for AS, the movement is very well made. All important bearings contain rubies, of course. On the gear train bridge, there’s even a ruby for the minute wheel bearing and a cap jewel for the escape wheel bearing. In total, 17 jewels, two more, than standard in the 1940s.

AS 1001: base plate

base plate

The gear train with the filigree escape wheel is the standard one:

The mainspring barrel drives the center minute wheel, followed by third and fourth wheel and finally the steel escape wheel.

AS 1001: gear train

gear train

As regulating device, a two leg screw balance is used, which controls a swiss pallet lever escapement. Of course, the balance is not yet shock protected.

AS 1001: side view of the gear train

side view of the gear train

On the dial side, you see the keyless works with the yoke. On top, there’s a small partial minute dial, which was used to regulate the movement without dial, prior to casing.

AS 1001: AS 1001: Dial side

AS 1001: Dial side

On the export version, you can see, how the ruby bearings were replaced by brass bushings.

AS 1001: dial side of the export version

dial side of the export version

Another indication for the age of this, one the movement side not really old-fashioned looking movements is the “AS” hallmark and the caliber number on the dial side. The watchmakers were not happy about that, because they had to remove the dial for a reliable identification. They claimed a lot about that, which lead to a change on the manufactures, which later put their hallmarks and caliber numbers either below the balance wheel on the base plate or on one of the bridges, thus allowing quick and reliable identification, even when the movement still resides in the case.

In the lab

The specimen shown here was gummed and the escape wheel was magnetized. Both were fixed with a simple service.

Timegrapher result

The timegrapher results are really well for such an old and tiny movement. You can imagine, how well they must have been, when the movement was new.

horizontal positions
dial up +16 s/d 288° 0.4ms
dial down +11 s/d 202°
vertical positions
crown right (12 up) -6 s/d 177°
crown up (3 up) +29 s/d 239° 0.4ms
crown left (6 up) +8 s/d 179°
crown down (9 up) -6 s/d 170°

Technical data

Size:7 3/4''' (measured: 17,1mm)
lift angle:52.23°
Number of jewels:7/17
Escapement:Pallet lever
Balance types: Nickel screw balance
Shock protection(s): none
Balance bearing / direction hairspring:Clockwise
Moveable stud:no
Adjust mechanism:Long regulator arm
  • 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)
References: Ebauches: 1949 33
Flume: 1947 18
Jacob: 1942 7 (11 005)
Inventory number:20048

Usage gallery

AS 1001: Richard ladies' watch

Richard ladies' watch

AS 1001: Westfield ladies' watch

Westfield ladies' watch