Selle San Marco Regal is probably the most popular copper rivit plastic saddle though it does not have a rivit on the nose. In any case, it would be period correct and not look at all out of place.
http://velobase.com/ViewComponent.as...9-34cb46f9736f
Most likely your marked down Super Special was a leftover from an earlier model year (1985??) when you bought it. Super record ceased producion in 1986 and was really showing its age against competing grouppos by 1987.