One Used Original Buick Part #5968310, Right Hand (passenger side) Tail Lamp Assembly, is for:

1977 1978 1979 1980 1981 1082 1083 1984 1985 1986 1987 1988 1989 1990 Buick Full Size Station Wagon.

The lenses, gasket, and housing are all in very good condition. 

The chrome housing has a number of small pits and the black paint is pealing off.