Running again after some upsetting problems and a long recovery period.
The whole caliber 3017 - The 10 000 series and the losange 1-MChz mark would date it in the 60's First Moscow Watch Factory production. The missing beige marks and dial tips were additionnaly restored using acrylic paintsafer the picture above :
The watch stage without the chronograph components.
Disassembled before cleaning :