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ETA 1301

 
ETA 1301 |

ETA 1301

Description

The ETA 1301, which was produced around 1950 is an interesting ladies’ watch movement. It is rather small with a diameter of 8 3/4 lignes and so ideal for small watches.

It uses a large, gold-toned, Incabloc-protected Glucydur balance with screws and a long regulator arm for the hairspring and so guarantees a quite high precision.

The construction of this movement is unusually high, around the ratched wheel, there are even two gears above it. The large height is due to the directly driven center second hand and to the still center-located, directly driven minute wheel. In later constructions, the minute wheel is driven indirectly and on the dial side, to free enough space for placing the second wheel below the single main plate.

Technically and optically this is a very nice movement.

ETA 1301: ETA 1301 dial side

ETA 1301 dial side

Technical data

Manufacturer:ETA
Caliber:1301
Size:8 3/4'''
A/h:18000
Number of jewels:17
Escapement:Pallet lever
Balance types:Glucydur screw balance
Shock protection(s):Incabloc
Balance bearing / direction hairspring:Counterclockwise
Moveable stud:no
Adjust mechanism:Long regulator arm
Construction:
  • lever
  • escape wheel, seconds wheel, third wheel
  • center minute wheel
  • mainspring barrel
Winding mechanism:yoke winding system
Setting lever spring:3 holes
Features:
  • SCD (direct center seconds)
References:Flume: 1962 3
Hint: The jewel count, the types of balances used, and the shock protections employed refer only to the specimens held in the archive and are therefore not relevant for the precise identification of the movement.

Usage gallery

ETA 1301: Onsa Sport ladies' watch

Onsa Sport ladies' watch

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