Russian Model 1913 76 mm Mountain Gun in <a href="//commons.wikimedia.org/wiki/Finnish_Artillery_Museum" title="Finnish Artillery Museum">Finnish Artillery Museum</a>. Museum description states that this particular gun is a combination of a Russian barrel and a carriage manufactured in Finland in the 1920s, but it is practically indistinguishable from the original Model 1913 gun.
<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)">Balcer</a>
CC BY 2.5
<span class="int-own-work" lang="en">Own work</span>