<p>Soviet 122 mm howitzer Model 1909-1937, displayed in Hämeenlinna Artillery Museum.  The Model 1909 howitzer was based on a German Krupp design. They were produced in Imperial Russia and then in the Soviet Union.  As was typical for most World War I artillery pieces, the gun was modernised from 1937 onwards, the resulting guns called Model 09-37.  
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>