What year is this bike from?

I know this is a classic and rare DBS «La Migliore» racing bike from around the late 80s / early 90s?

This is a top model from DBS, with a frame manufactured by Italian Daccordi (engraved in the frame). The bike is assembled in Norway by DBS Racing Depot.

Equipped with a contemporary Shimano 600 / Ultegra group.

This is what I know about the bike. Does anyone have more information?

Thanks!