Yes, you are correct. The earlier Japanese Tascos were actually better. The one friend who has one that didn't fail (with the .243) had a Japanese Tasco Model. I am not saying that all Japanese Tasco models will not give any problems, just that at least one did not. That's why I'm just saying, hope for the better, but expect the worst.
Now, would I personally ever buy a Tasco, even an earlier Japanese made Tasco? No. But if a person buys a gun that has an earlier Japanese made Tasco scope, then that's better than buying it with a non-Japanese made Tasco scope (which, if I remember correctly, were later made in China.)
Zachary