I just purchased a Kowa TSN 663 ED 20-60x66 Angled Spotting Scope Package from the Eagle Optics store near closing time. I got home and noticed the scope does not say ED. My receipt does and your website appears to show the ED on the scope.
Does mine in fact have the ED lenses?
All of the 663 scopes have ED glass. At one point, Kowa did make a version of this scope without ED glass, and it was called the 661. These have been gone for quite some time.
All of Kowa’s scopes that use either ED glass or flourite crystal will be designated as being part of their Prominar series, and will say so on the scope body and will also have a thin red ring around the barrel where the sunshade begins. Your scope should have the Prominar designation on it along with the red ring at the end of the barrel.
If you have any other questions, just let me know.