Sketch of a flat of the WBS 70 series built in the German Democratic Rebublic. 1 meter equals 4 pixels.
<div style="display:inline-block;padding:0 3px;background-color:#CCF">Original:</div> <div style="display:inline-block;padding:3px 0;"><a href="//commons.wikimedia.org/wiki/User:T.woelk" title="User:T.woelk">t.woelk</a></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:Malyszkz" title="User:Malyszkz">Malyszkz</a></div>
Own work based on: <a href="//commons.wikimedia.org/wiki/File:WBS_70.gif" title="File:WBS 70.gif">WBS 70.gif</a>: 