Tasco have never had there own factory or made anything,It is a brand name!
In the early days there stuff was decent and made by optical light warehouse or HAKO in Japan.
It has changed owners numerous times in the past few years.
The Yanks now call the brand Trashco because quite frankley thats what it is.

All low brand Bushnell and tasco are the same item cheap S***.

I had a 2.75x40 Japan made tasco in the early 80's excellent quality as as are the World Class and similar ilk.

Check out Chuck Hawkes web site, he will tell you all about it!!!!!