*MODERN* balance means that balcne fit for modern version of all 24 Vostok caliber movements - produced during last 20-25 years.
This *MODERN* version has FLAT surface of the doubled roller. You can see on the pictures below the detailed notice about this MODERN design nuances.
Item shipped well packed.
Produced by Vostok Inc.
Favinov watch manufactory
USA STORE