Cub and Dad

Admittedly, 51, 54, and 57 don't have the word Lowden on them.  But they are the only ones  found so far and they fit in the series.

LCD-45                        LCD-46                  LCD-48                          LCD-50

LCD-51                                      LCD-54                                    LCD-55

LCD-56                                      LCD-57                                      LCD-58

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LCD-73                                          LCD-90                     LCD-95a

From a May 1950 Council Newsletter:

LCD-95b