<a href="https://en.wikipedia.org/wiki/Theodolite" class="extiw" title="en:Theodolite">Transit theodolite</a>, on display in the <i>Schulhistorische Sammlung</i> (School Historical Museum), Bremerhaven, Germany.
<a href="//commons.wikimedia.org/wiki/User:Hgrobe" title="User:Hgrobe">Hannes Grobe</a> (<a href="//commons.wikimedia.org/wiki/User_talk:Hgrobe" title="User talk:Hgrobe"><span class="signature-talk">talk</span></a>)
CC BY 3.0
own work, Schulhistorische Sammlung Bremerhaven