1917 AD., Germany, Westphalia, City of Münster, Notgeld, 10 Pfennig, Funck 350.1.

Deutschland, Notgeld, Münster in Westfalen, 1917 AD.,
10 Pfennig (19 mm / 1,81 g), Zink,
Obv.: STADT - MÃœNSTER i. W , Stadtwappen: einen von Gold, Rot und Silber geteilten Schild mit Spangenhelm und Helmzier.
Rev.: KRIEGSGELD 1917 / 10 / PFENNIG , Wertbezeichnung und Jahr.
Funck 350.1 ; Ems 2-2 ; Lamb 339.1 ; Menzel - .

At the end of WWI in Germany there was a general distrust in the former systems. So people kept the good metals at home. People became more and more engaged in countertrade cause local economies lacked small change.
To avoid a complete economical breakdown cities and other big institutions issued small change made of low-value materials like steel, zinc, paper. Even a late silver issue (a 50 Pfennig piece) was blackened to hide the silver content and to keep the issue in circulation.

As far as i know these issues at first and to a limited extend played some local role in small transactions til the inflation of 1921-3 made these Pfennig values to token or gaming counters.
http://en.wikipedia.org/wiki/Inflation_in_the_Weimar_Republic
The real value still was the old gold and silver or something useful for survival.