Eterna 82

 
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Eterna 82

Description

In the 1920ies, wristwatches for ladies were still unkommon, rare and thus expensive.

The Etera 82 with a diameter of 10 12 lignes dates from that era and is a high quality, but very typical of the time movement, which was made for ladies’ watches, often in gold cases.

base plate

base plate

The fact that the base plate is brass-colored or yellow-fired was common at that time, but it is also recognizable that the processing was very elaborate, because for each wheel, and also for the balance, several steps from the massive base plate were milled out.

Of course, there are ruby bearings for all important bearings, so that this movement uses 15 jewels, the top amount of that time.

gear train

gear train

It’s noteable, that the gear train is built in the way, that the seconds wheel is located at 9 o’clock, opposite of the crown. This construction was used previously for necklace or pocket watches with a crown on the top (12 o’clock) and a decentral second hand at 6 o’clock.

side view of the gear train

side view of the gear train

The gear train is a very common one with central minute wheel, third wheel, seconds wheel, steel escape wheel and pallet lever.

The bimetal screw balance is very beautiful and oscillates with 18000 A/h. It can compensate the temperature deviation of the steel hairspring.

Eterna 82: Dial side

Eterna 82: Dial side

On the dial side, there’s already a native yoke winding system. For the 1920ies, this was more or less bleeding edge.

Technical data

Manufacturer:Eterna
Caliber:82
Number of jewels:15
Escapement:Pallet lever
Balance types: bimetallic screw balance
Shock protection(s): none
Balance bearing / direction hairspring:Counterclockwise
Moveable stud:no
Adjust mechanism:Long regulator arm
Construction:
  • lever
  • seconds wheel
  • third wheel, center minute wheel
  • mainspring barrel
Construction type:solid construction
Winding mechanism:yoke winding system
Setting lever spring:2 hole(s)
Functions:hour, minute
A/h:18000
Size:10 1/2''' (measured: 22,7mm)
Inventory number:18028

Usage gallery

Eterna ladies' watch  (without case)

Eterna ladies' watch (without case)

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