To differentiate between the various revisions of the model, Porsche 356s are customarily classified into several major groups. The 356 coupés and soft-top ‘cabriolets’ built through 1955 are readily identifiable by differences in windscreen design; the cars built between 1948 and 1952 have split windscreens; those from 1953 to 1955 are bent and center-creased.