ETA 372

ETA 372 |

ETA 372


A particularly high-quality “early work” of the ETA is the ETA 372, a variant of the ETA 371 series. This form movement is only 5 1/4 lines wide and uses 17 jewels.

ETA 372: base plate

base plate

Of yourse, all impoprtant bearings contain rubies, some red, some transparent.

The movement-side escape wheel bearing has got a large edged cap jewel.

ETA 372: gear train

gear train

We have the classical gear train here with filigree gears: The mainspring barrel directly drives the center minute wheel, followed by third wheel, seconds wheel and steel escape wheel. For the small size of the movement, the gears are pretty large.

ETA 372: side view of the gear train

side view of the gear train

As escapement, a swiss pallet lever escapement is used, which is controlled by a monometallic screw balance. This balance is not yet shock protected and beats with 18000 A/h. Its frequency can be adjusted with a long regulator arm.

ETA 372: open winding mechanism

open winding mechanism

The caliber 372 with its covered winding mechanism, called “System Patek”, is a variant of the ETA 371. Besides the very elegant looks, it is questionably, if there are technical advances of this execution.

ETA 372: ETA 372: Dial side

ETA 372: Dial side

On the dial side, you can see the old round ETA hallmark at 6 o’clock. This hallmark was used in the 1930s. Besides this, you see the usual suspects, such as the yoke winding system and the cap jewel for the balance wheel bearing.

Technical data

Caliber base:ETA 371
Size:5 1/4 x 8 1/2''' (measured: 12,8 x 19,15mm)
Number of jewels:17
Balance types: monometallic anular balance (two legs)
Shock protection(s): none
Balance bearing / direction hairspring:Counterclockwise
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:3 hole(s)
References: Feilner: 41 3662
Flume: (1947 119)
Jacob: (15015)
Inventory number:22011

Usage gallery

ETA 372: C.Bucherer Lucerne ladies' watch

C.Bucherer Lucerne ladies' watch

This movement and watch is a kind donation Karl Höhl to the movement archive. Thank you very much for your kind donation!