I will post this here rather than the "Space History" section since i think I am more likely to get a reply here.
We know from statements about the Foton
-F satellites in the late 1980s that the Soviets were re-using the descent "Shariks
" from earlier missions.
Have there ever been any pulished indications when the Soviets started to re-use the Zenit-class Shariks
? I would guess that they were doing it in the 1970s from the number of flights, but what about the the 1960s?
And on a related issue, what about reusing the descent craft from the close-look Yantar