ETA 980
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| ETA 980 |
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Description
The ETA 980 was produced some decades; the oldest version are quite different from
the most recent ones, only the basic layout is the same.
The screw balance shown on the old version here was later on replaced by a modern
screw-less type, the old 15 jewels later increased to seventeen, by putting one jewel
into the minute train bushing and the second one as cap jewel for the escapement wheel.
This movement has got a diameter of 8 3/4 lignes, a small subsecond hand at "6" and
a screw balance without regulator arm. A shock protection was not yet available on the
old version, but the decoration was much nicer with angled briged and jewels,
which contain a golden tone ring among them and remind of chatons.
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| dial side view |
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On the dial side, there is of course a yoke winding system, unfortunately, on the
specimen shown here, the yoke spring is broken and missing - a tribute to its age.
The partial minute dial on the plate was often found on vintage movements and
helped to regulate them when not yet put into a case.
This movement was probably launced in the late 1940ies and was available in two
versions: Version I had the opening of the yoke spring head directing to "3",
version II directing to "6". Since that spring is missing on my movement, it cannot
be 100% properly identified.
Technical data
| Manufacturer | ETA |
| Caliber | 980 |
| Number of jewels | 15 |
| Escapement | Anchor with pallets |
| Balance | Nickel screw balance |
| Shock protection(s) | none |
| Balance cock direction | clockwise |
| Hairspring stud | fixed |
| Regulator type | Hairspring key |
| Movement construction | Fork
Escapement wheel, Fourth wheel, Third wheel, Center wheel
Mainspring barrel |
| Features | s |
| Functions | Hour, minute, small second |
| Beats per hour | 18000 |
| Size | 83/4''' |
| Image in Flume Werksucher | 1947 22 |
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| Factsheet |
Usage gallery
