Instead of a sport on the stamp sheet the Bonk 1 Bz had 7 LBE-only ‘transformation’ stamps. They appeared over the Year of the Signifying Frog in seven different LBEs, and in order they showed the werewolf of standard stamp transforming back into human shape. They are said to have been included at the rate of 1:5 per LBE issue. Each transformation was printed in its own sheet of stamps, the layout for which mirrored the standard 1 Bz sheet. A few imperforate examples on gummed paper of these exist, and a few perforated examples can be found in DW Stamp Collections, some having been awarded as prizes

The common stamp and, in order, the seven transformations - click image to view full screen

                                                               The LBEs that these stamps were found in.
      
                   The Deutsches Con                              The Light of the Moon                               Beautiful Music
                                  
                                                   The Genua Swamp                                   George’s Bottom
      
                           Sir George                                          Poor Heinrich                                        Aunt Helga

An imperforate sheet of Transformation 1 stamps