The watch is rare.  Rare and very high quality mechanism.  The clock works well.  The key works well.  The calendar works well.  The watch shows signs of long storage and use.  They work very well.  Vintage Soviet Watch Slava Constellation Rare Work Well.  GREAT CHOICE !See the collection of watches in my shop !See the details on the photo.  Thank you !  Visit my camision store, CIS retro items.