AS 1237/38

AS 1237/38 | - The Movement Archive

AS 1237/38


AS is normally a safe bet, when you look for higher quality movements. Normally… Because the AS 1237 / 38 is not only an entry level movement, but also cannot be identified to a single number only.

The specimen shown here was made for export into the USA and so got only seven jewels.

AS 1237/38: base plate

base plate

Since the seven jewels spread out on four jewels for the balance wheel bearing, one for the ellipse of the balance and the remaining two for the pallets, are all other bearings only equipped with metal bushings. However, they are not just drilled, but pressed into the plates and bridges, just like jewel bearings.

AS 1237/38: gear train

gear train

The gear train is, as usual on AS movements, made in good quality. It’s a contemporary construction with directly driven center minute wheel, followed by third wheel, seconds wheel at 6 o’clock (used for a decentral seconds indication on the dial side) and a fine executed steel escape wheel.

AS 1237/38: side view of the gear train

side view of the gear train

The two leg screw balance is not yet shock protected. Here precise beating frequency is adjusted with a long regulator arm.

AS 1237/38: gear train bridge

gear train bridge

The gear train bridge reveals the, compared with other AS movements, simple construction: Below here, not only all gears are beared, but also parts of the winding system. On top of it, a cap plate is screwed, which bears the mainspring barrel.

AS 1237/38: AS 1237/38: Dial side

AS 1237/38: Dial side

On the dial side, there’s a rocking bar winding system, which is pretty unusual for AS. Nevertheless, it is very well executed with a real click pawl and spring.

Technical data

Size:10 1/2''' (measured: 23,1mm)
Number of jewels:7
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:pillar construction
Winding mechanism:rocking bar winding system
Setting lever spring:4 hole(s)
  • SCD (direct center seconds)
References: Flume: (1949 I 84)
Inventory number:19032

Usage gallery

AS 1237/38: Ingersoll gents watch

Ingersoll gents watch

This movement and watch is a kind donation from Mario König to the movement archive. Thank you very much for your support!