70- Vostok Precision Class

This watch was produced by the Chistopol Watch Factory in the 1960ies. It mounts a 22J movement with central seconds and a larger balance designad for increase accuracy.
Chistopol mounted this caliber in watches branded Vostok, Wostok (for export in germany) and volna. The legend "precision class" on the dial (shown in russian in this watch) was included only on watches that passed a set of more stringent tests during assembly.
See also numbers 32 , 24 and 13

Other translitarations: Wostok
Original name in Cyrillic: ВОСТОК

Some pictures:



Backcase:



Movement views:





A detailed picture of the balance with micro-regulator: