Historically important model - one of the first automatic movements with a bearing rotor - one of the firs Eterna Matic model, Eterna logo - 5 bearings.

Unsigned crown - it seems to me that it is original for this watch, it perfectly matches the tube and case - at that time, Eterna has not yet signed crowns. 

The crystal is new. 

The rotor probably replaced with a newer version 1249UT - works quietly and has no excessive slack.

Rest parts of the watch seems to be factory original.

Movement going strong with high balance amplitude and keeping time very good (+/- 30 seconds per day depends position), my average on/off wrist is about +5 seconds per day. Service history is unknow.

Beautiful and very rare watch !!!