In the late 1980s, Colnago gave its former flagship, the Super, a facelift and added some extras. The then new Model called Superissimo featured chromed head lugs and an internally routed rear braking cable. The seat lug cluster went through some modernization, too, whilst the successful geometry got even more sportive with a shorter top tube.
from Steel Vintage Bikes:
In the late 1980s, Colnago gave its former flagship, the Super, a facelift and added some extras. The then new Model called Superissimo featured chromed head lugs and an internally routed rear braking cable. The seat lug cluster went through some modernization, too, whilst the successful geometry got even more sportive with a shorter top tube.
https://www.steel-vintage.com/colnago-superissimo-post-modern-road-bike-detail
or
https://www.steel-vintage.com/colnago-superissimo-thron-1990s-classic-road-bike-detail