(meterless                 (metered
                   versions)                  versions)                                          aids in identifying
1967                                           Super BC                                    requires battery for CdS meter
                                                        ^
                                                        ^
1965                                           Super 65
                                                        ^
                                                        ^
1962                                            Super B
                                                        ^
                                                        ^
1959         Rapid                           Super                   Prima             Super is only model with a knurled knob
                 ^                                      ^                          ^                to adjust aperture under the rewind knob
                 ^                                      ^                          ^
1957          ^    Alpha                         ^                       Beta
                 ^        ^                            ^                          ^
                 ^        ^                            ^                          ^
1956         Contaflex III             Contaflex IV                ^                Removable front element to change lenses
                       ^                              ^                           ^
                       ^                              ^                           ^
1954         Contaflex I -->   --> Contaflex II   -->   -->   ^                 Fluted knob at front of lens
                       ^
                       ^
1953         Contaflex I

source: Contaflex Guide by W.D. Emanual, 12th edition, Focal Press