<p>Russian <a href="https://en.wikipedia.org/wiki/87_mm_light_field_gun_M1877" class="extiw" title="en:87 mm light field gun M1877">Model 1877 87 mm field gun</a>, barrel manufactured by Krupp, displayed in Hämeenlinna Artillery Museum.  
Photo taken on June 18, <a href="//commons.wikimedia.org/wiki/2006" title="2006">2006</a>.
</p>
Source: Photo by me, <a href="//commons.wikimedia.org/w/index.php?title=User:Balcer&amp;action=edit&amp;redlink=1" class="new" title="User:Balcer (page does not exist)">User:Balcer</a>.
<a href="//commons.wikimedia.org/wiki/User:Balcer~commonswiki" title="User:Balcer~commonswiki">Balcer~commonswiki</a>
CC BY 2.5
<span class="int-own-work" lang="en">Own work</span>