The number stuck in my head is 1983, but I doubt my memory and was trying to confirm.
Google: toshiba submarines silent
It will take you to a Time mag article from 1987, when the story broke.
Toshiba and their Norwegian partner sold the Soviets the technology for computerized lathes that could produce the super silent propellers for the Russian subs from 1981-1984.
We knew something was up when the Soviet subs strated running much quieter. They had 265 attack subs to our 96 subs, and this almost caused a “sub gap”.
Remember in context,this is still at the height of the Cold War. Reagan would visit Moscow in 1988;the Berlin Wall came down in 1989; and the Soviet union broke up in 1991.
Thank God for Ronald Reagan.
You've got me - I'm still friends with my ex-boss, but I'm too tired to do a search. In my opinion, Toshiba still sucks. Anyone who wants to suggest that they were unjustly convicted of collaborating with the (then) enemy, have at it. I still won't buy a Toshiba anything...