The Stromberg WW is a 2 barrel downdraft carburetor which was used on the following vehicles:
Buick 1955-1961, Chevrolet 1955-58, Chrysler 1955-57, Dodge 1953-70, Desoto 1955-57, GMC 1960-74, Oldsmobile 1954-55, Plymouth 1955-67, Pontiac 1955-56 and Studebaker 1953-64.
The carburetor number was stamped on the float bowl cover (top) and might also have a tag.