Buick Super Estate Wagon
Buick used the Estate name on their full-size station wagons.
The first Buick Estate used a wooden body and was offered on the 1940 Super model. It was available on Buick's B-body Special series in 1941 and 1942, and later on Buick's larger C-body (Roadmaster and Super) in the 1946-53 model years. From 1954-1958 it was only offered on the smaller B-body Century and Special, with all steel bodies. Among these were hardtop Estate Wagons called Caballero that were offered only in 1957 and 1958.
Source: Wikipedia, 2011