ETA 2369

 
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ETA 2369

Description

In 1952, the ETA launched one of their most modern and successful ladies’ selfwindig movements.

With a diameter of only 7 34 lignes, it was really tiny, but offered lots of features, such as a selfwindig mechamisn, center second hand and date indication. Not many manufacturers could offer such a large set of features. That amound led to a minor disadvantage: The height was with 5.6mm quite big, so the watches, which used that movement looked a bit clumsy.

The ETA 2369 was produced for one and a half decades, until it was superseded in 1966 by the only marginally modified caliber 2551, use the same basic construction and only changed details such as the balance beating rate. The design with directly driven center second hand and indirectly driven minute hand was never changed.

So, this construction of the early fifties was a really genious one!

modern type

modern type

In the 14 years, while this movement was produced, it was slightly modernized with the not really required “fashion” jewels on the pawl winding wheels were omitted and the balance with screws was superseded by a screwless balance, which also featured a modern moveable hairspring stud instead of the old static one.

without selfwinding mechanism

without selfwinding mechanism

The gear construction was done by most modern knowledge. The center second hand was directly driven, while the minute hand was driven by the decentral driving wheel. The cannon pinion however used the typical ETA construction with the large moveable gear.

Of course, all bearings contained synthetic rubis and the balance was beared in two Incabloc shock protection systems. The moveable regulator contained a short regulation arm and was movemed directly at the place, where it looked out below the selfwindig plate.

selfwinding mechanism

selfwinding mechanism

The selfwinding mechanism used the common ETA pawl winding wheels plus two following gears.

On manual winding, the clicks of the pawl winding wheels detatch the rotor.

ETA 2369 dial side

ETA 2369 dial side

On the dial side, there’s of course a yoke winding system.

The date ring slowly advances and can be corrected semi-fast by turning the time back and forth - this was a common correction mechanism in these times.

Technical data

Manufacturer:ETA
Caliber:2369
Number of jewels:21/25
Escapement:Pallet lever
Balance types: Nickel screw balance
Nickel anular balance
Shock protection(s): Incabloc
Balance bearing / direction hairspring:Counterclockwise
Moveable stud:no/yes
Adjust mechanism:Hairspring key
Construction:
  • lever
  • escape wheel, seconds wheel, third wheel
  • large driving wheel, mainspring barrel
Winding mechanism:yoke winding system
Features:SCD,QG,RDR,AUT
Functions:hour, minute, second, day, selfwinding
A/h:18000
Size:7 3/4'''
Production period:1952-1966
Literature: Flume: 1962 100

Usage gallery

Helfora Automatic ladies' watch

Helfora Automatic ladies' watch

Britix Automatic ladies' watch

Britix Automatic ladies' watch

Links