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.
|Number of jewels:||17|
Glucydur screw balance|
|Balance bearing / direction hairspring:||Counterclockwise|
|Adjust mechanism:||Long regulator arm|
|Winding mechanism:||yoke winding system|
|Setting lever spring:||3 hole(s)|
|Functions:||hour, minute, second|
Flume: 1962 3|