Hi Dave,
I think the 8x32 BN came out in the 1996-98 period. You might take a look at the
Eagle Optics 1995 Catalog, which shows the earlier model Ultravid. Leica owners would know more of the history than I do, but in its day the 8x32BN was considered the finest birding binocular. It is still a great binocular.
Ed
PS. Opps, got the 9s inverted to 6s.