This is a tiny ladies’ watch movement with indirect driven center second.
Movements of this shape with center second are pretty rare, since they require a complex construction with two plates because of the reduced size.
The filigrane Citizen Parashock 3 shock protection system can be seen here very well. Not many systems are that filigrane than this one.
|Size:||6 3/4 x 8'''|
|Number of jewels:||17|
Glucydur anular balance|
Parashock 3 (Citizen)|
|Balance bearing / direction hairspring:||Counterclockwise|
|Adjust mechanism:||Hairspring key|