50 Pfennig <a href="https://en.wikipedia.org/wiki/Notgeld" class="extiw" title="en:Notgeld">"Notgeld" banknote</a> (1921) of <a href="https://en.wikipedia.org/wiki/Boppard" class="extiw" title="en:Boppard">Boppard</a>, size: 69 mm x 95 mm.
Issued by the Town of Boppard, reproduced from an original banknote by <a href="//commons.wikimedia.org/wiki/User:Palauenc05" title="User:Palauenc05">Palauenc05</a>
1921-04-21
Private archive.