A bicycle frame is being supplied with a FEIN code. The code gets copied from the pattern to the bicycle frame with a pantograph. The FEIN code is a German authentication method to protect personal property from theft by appliyng an individual number which indicates the owner.
<a href="//commons.wikimedia.org/wiki/User:EvaK" title="User:EvaK">Eva K.</a>
GFDL 1.2
<span class="int-own-work" lang="en">Own work</span>