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Public domain, I made this photo self with the two patterns "100er offen.png" and "100er geschlossen.png" (also Public Domain); user:ocrho.
Public domainPublic domainfalsefalse
I, the copyright holder of this work, release this work into the public domain. This applies worldwide. In some countries this may not be legally possible; if so: I grant anyone the right to use this work for any purpose, without any conditions, unless such conditions are required by law.