Lechner A-390
For the 1992 Olympics, 'Lechner A-390 was an Olympic Class. It was only raced at the Games that year.

Description
Lechner was modified their Division II to bring the centreboard and mast track further aft. The rig supplier, Neil Pryde, was decided 3 years before the Olympics. 

The supplied equipment stayed with the sailor for the entire regatta as it was expected that each board needed special tuning to the daggerboard system.