Hanging flag of the former municipality of <a href="//commons.wikimedia.org/wiki/Category:Kellen" title="Category:Kellen">Kellen</a>
<div style="display:inline-block;padding:0 3px;background-color:#CCF">Original:</div> <div style="display:inline-block;padding:3px 0;">Unknown</div> <div style="display:inline-block;padding:0 3px;background-color:#CCF">Vector: </div> <div style="display:inline-block;"><a href="//commons.wikimedia.org/wiki/User:J%C3%BCrgen_Krause" title="User:Jürgen Krause">Jürgen Krause</a></div>
granted on 6 September 1961
Amtsblatt für den Regierungsbezirk Düsseldorf, 141. Jahrgang, 1961, S. 445