Back-of-book stamps: locals and cinderella's collection

I also collect several types of Back-of-the-book stamps.
The most interesting ones are:

• Julemærker / X-Mas seals from Denmark. For more seals/Julemærker click here. Some year issues I tried to reconstruct the total sheet,

  For some examples click here.

  
  
• Perfins from Denmark. More perfins click here.
  
• Stamps related to "Nicolaus Copernicus."
  Nicolaus Copernicus[b] (19 February 1473 – 24 May 1543) was a Renaissance polymath who formulated a model of the universe that placed the Sun rather than Earth at its center.
• Precancels from Canada - Great Britain and other countries.
  The overprints from Grat Britail are commercial overprints from companies.

  More precancels click here.

  
  
• Windmill on stamps.
• Telephones on Stamps
• Local stamps from Great Britain linke Lundy, Davaar, Herm Island en Jethou.
  

  More examples click here.

  
• Geographical maps on stamps.